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SERVICE MANUAL 6408F US&S GENISYS APPLICATION

1. J3 FIELD COMM NOTES 1 CPU B JUMPERS J4 AND J7 MUST BE IN B C POSITION TO SELECT PASSIVE CURRENT LOOP INTERFACE FOR J3 2 ALL MODEM CONTROL SIGNALS ARE EIA LEVEL INPUTS AND OUTPUTS DCD INPUT MUST NEVER BE CONNECTED TO A TTL LEVEL SOURCE THAT COULD TAKE IT TO QV RTS OUTPUT IS COMPATIBLE WITH TTL LEVEL INTERFACE PROVIDED DE ASSERTED STATE OF V IS FUNCTIONALLY EOVIVALENT TO OV 2 RTS AND SG GND ARE NECESSARY ONLY IF PRCCI IS REQUIRED TO KEY CARRIER ON TO TRANSMIT Figure 2 19 Typical TTL Level Carrier Interface 6408F p 2 19 SECTION III OPERATION 3 1 OVERVIEW When power is first applied or the master reset switch is pressed each cpu board independently executes self tests to verify the integrity of the EPROM set and RAM Following successful completion of these tests the DIP switches are read the message EMULATE GENISYS is displayed on the front panel and the PRCCI vwaits for the office to establish communication In the event that one of the self tests fail the watchdog timer is allowed to trip and reset the cpu board This is indicated by LEDI flashing on the failed cpu board Should an error message be displayed refer to section 3 6 for corrective action Briefly the office should initialize the PRCCI and configure it to the installation The office then requests indications from all stations on the code line through a sequence of individual recall requests When there are no pending control or recal
2. 00 0F 00 FF n 2 00 FF n 1 00 FF n F6 Description message header PRCCI address auxiliary header SCR number SCR flags CRC 16 low byte CRC 16 high byte ETX 6408F p 7 2 7 2 5 Status Indication Register Request Byte mu gt C Range F7 01 FF A4 00 FF 00 FF F6 Description message header PRCCI address auxiliary header CRC 16 low byte CRC 16 high byte ETX 7 2 6 Indication Database Request Byte DN OU a CO hn ha 7 2 7 Local Byte OY O Aa C9 tQ Range F7 01 FF Al 00 FF 00 FF F6 Description message header PRCCI address auxiliary header CRC 16 low byte CRC 16 high byte ETX Control Request Range FC 01 FF 00 00 FF 00 FF 00 FF F6 Description message header PRCCI address control byte number control byte data CRC 16 low byte CRC 16 high byte ETX 7 2 8 Execute Local Control Byte Qn Aa WN re 7 2 9 Local Range FE 01 FF 00 FF 00 FF F6 Description messaqe header PRCCI address CRC 16 low byte CRC 16 high byte ETX Indication Recall Range FD 01 FF 00 FF 00 FF F6 Description message header PRCCI address CRC 16 low byte CRC 16 high byte ETX 6408F p 7 3 7 2 10 Control Request Byte Range F8 01 FF AC 01 7F 01 20 Un do W p 00 1F 00 FF 00 FF 00 FF F6 7 2 11 Execute Control Description message header PRCCI address auxiliary header station
3. 1 FE message header 2 01 FF GENISYS address 3 00 FF CRC 16 low byte 4 00 FF CRC 16 high byte 5 F6 ETX 7 4 5 Indication Recall Byte Range Description 1 FD message header 2 01 FF GENISYS address 3 00 FF CRC 16 low byte 4 00 FF CRC 16 high byte 5 F6 ETX 7 5 GENISYS TO PRCCI MESSAGES 7 5 1 Control Checkback Byte Range Description 1 F3 messaqe header 2 01 FF GENISYS address 00 1F control byte number 00 FF control byte data n 2 00 FF CRC 16 low byte n 1 00 FF CRC 16 high byte n F6 ETX 6408F p 7 7 7 5 2 Indication Byte Range Description F2 message header 01 FF GENISYS address Nr 00 1F E0 indication byte number 00 FF indication byte data n 2 00 FF CRC 16 low byte 1 00 FF CRC 16 high byte n F6 ETX 7 5 3 Acknowledge Byte Range Description 1 Fl message header 2 01 FF GENISYS address 3 F6 ETX 6408F p 7 8
4. CLEAR option argl ERRORS HISTORY type FIELD OFFICE TIME PRCCI gt LOGOUT Maintenance session closed on PRCCI 2 6 4 COMMAND DESCRIPTIONS This section describes the syntax and use of the maintenance session commands Any command element that appears in upper case is referred to as a key word and is considered part of the command syntax A key word may be entered in either upper or lower case using enough characters to make it unigue from any other key word allowed in the particular command line Elements that appear in lower case indicate either that one of several key words or a numeric argument is to be used in the command line Key words to be substituted in this manner are listed below the element in the syntax description Elements enclosed in sguare brackets may be considered optional and need not be entered for the command to be accepted These may include key words or numeric arguments All elements entered in a command line must be separated by at least one space 6 4 1 CLEAR Syntax CLEAR option argl ERRORS HISTORY type FIELD OFFICE TIME 6408F p 6 3 The CLEAR command purges specific report and historical information that is maintained by the PRCCI 6 4 1 1 CLEAR ERRORS Syntax CLEAR ERRORS The CLEAR command entered with the ERRORS cption zeroes the indication gtation error counters and the line error counter 6 4 1 2 CLEAR HISTORY Syntax CLEAR HISTORY type FIELD OFFICE TIME The C
5. It then retries the transmission the next time that station is to be polled A station error or monitor condition is reported to the office only after a complete retry set has been performed A station failure is reported to the office only after a pre determined number of retry sets have been exhausted 5 6 EO BYTE DESCRIPTION The EO byte provides for the control and indication of certain optional features including the use of secure polling and control checkback Power on or reset of a GENISYS unit is detected through the use of the database complete flag That flag represents the current state of the unit s control database The EQ byte flags are shown in figure 5 3 6408F p 5 4 The PRCCI automatically monitors the E0 indication byte and maintains the E0 control byte for each station Except for the database complete flag the flags to be set in the EO control byte are determined by the office at initialization time The office is not expected to specify an EQ control byte within a control request The PRCCI assumes however that any EQ indication byte returned from a GENISYS unit has changed and passes it to the office This allows the office to also detect power on or reset of a GENISYS unit The PRCCI determines if the transmission of an E0 control byte is required and relies on the next office control request for the station to determine when the transmission is permitted An EO control byte transmission is required if either the
6. queue is sufficiently emptied to accept additional requests SINQOV Indication queue overflow This flag is set to signify that the field indication queue has overflowed Previous indication data is lost since the queue is automatically cleared and the 6408F p 4 9 most recent indication is inserted The flag is cleared on reset initialization or by request of the office SDETER PRCCI detected error Reserved flag SLNERR Code line error This flag is set to indicate that an error SRCINI 4 5 3 SFLTRI SENCOD SENSEC SENCBC SALNRT SATPAR SRBADI was detected on the code line This flag is automatically cleared once communication is re established on the code line PRCCI initialization request This flag is set to request initialization from the office It may only ever be cleared by the office with a valid initialization message Status Control Indication Register 1 O sumi SENCOD SENSEC SENCBC SALNRT SATPAR SRBADI Figure 3 5 SCR SIR 1 Flags Enable indication change filter This flag is set to filter only changed indications to the office If cleared all indications as received are passed to the office It is set on reset and initialization Enable code line communication This flag is primarily intended for use on polling code systems Only when this flag is set is the PRCCI permitted to communicate with the fields It is cleared on reset initialization and during
7. 1 4 9 jJ 4 4 4 4 0 4 sa NN Ne 8 d 4 d wv l Hl I I Qo Qo OY OY MN QY Os UU Ut amp ER Aa P UC Ww 2 Ww tS t9 P9 P9 69 IS NN NN ILLUSTRATIONS Figure page 2 1 Binary Weights For Switch Positions 2 3 2 2 PRCCI Address Examples 2 3 2 3 SW8 Switch Assignments CPU A 2 4 2 4 Office Baud Rate Options 2 4 2 5 Office Transmit Key on off Delay Options 2 5 2 6 SW7 Switch Assignments CPU B 2 8 2 7 No Response Timeout Options 2 9 2 8 SW8 Switch Assignments CPU B 2 9 2 9 Baud Rate Options 2 10 10 Parity Stop Bit Options 2 10 11 SW9 Switch Assignments CPU B 2 11 12 Transmitter Key on off Delay Options 2 11 13 Bit Time Table 2 12 14 Asynchronous Character Format Office 2 13 15 RS 232C Compatible Interface Specifications 2 14 16 Remote Installation Using Multiple PRCCI Units 2 15 17 Asynchronous Character Format Field 2 17 i8 Typical EIA Level Carrier interface 2 18 19 Typical TTL Level Carrier Interface 2 19 4 1 Office Generated Messages 4 2 4 2 PRCCI Generated Messages 4 3 4 3 SCR 0 Flags 4 9 4 4 SIR O Flags 4 9 4 5 SCR SIR 1 Flags 4 10 5 1 PRCCI Generated Messages 5 2 5 2 GENISYS Generated Messages 5 2 5 3 E0 Byte Flags 5 5 vi tan SECTION I GENERAL INFORMATION 1 1 INTRODUCTION This manual describes the installation and operation of the Union Switch amp Signal Programmable Remote Code to Computer Interface PRCCI applied as an office code unit to a GENISYS code system Th
8. address control data byte count control byte number control byte data CRC 16 low byte CRC 16 high byte ETX Byte Range Description 1 F8 message header 2 01 FF PRCCI address 3 AE auxiliary header 4 01 7F station address 5 00 FF CRC 16 low byte 6 00 FF CRC 16 high byte 7 F6 ETX 7 2 12 Indication Recall Byte Range Description 1 F8 message header 2 01 FF PRCCI address 3 AD auxiliary header 4 01 7F station address 5 00 FF CRC 16 low byte 6 00 FF CRC 16 high byte 7 F6 ETX 7 3 PRCCI TO OFFICE MESSAGES 7 3 1 Local Control Checkback Byte Range F3 01 FF 00 00 FF 00 FF 00 FF F6 SHO 4 amp WN Hs Description message header PRCCI address control byte number control byte data CRC 16 low byte CRC 16 high byte ETX 6408F p 7 4 7 3 2 Control Checkback Byte Range Description 1 FS message header 2 01 FF PRCCI address 3 A3 auxiliary header 4 01 7F Station address 5 01 20 control data byte count 00 1F control byte number 00 FF control byte data n 2 00 FF CRC 16 low byte n 1 00 FF CRC 16 high byte n F6 ETX 7 3 3 Status Indication Register Data Byte Range Description 1 F4 message header 2 01 FF PRCCI address 00 0F SIR number 00 FF SIR flags n 2 00 FF CRC 16 low byte n 1 00 FF CRC 16 high byte n F6 ETX 7 3 4 Indication Byte Range Description 1 FS message header 2 01 FF PRCCI address 3 A2 auxiliary header 01 06 record type 01 good
9. and their options A repeater particularly a regenerative as opposed to an amplifier may tend to buffer and delay the transmission of data Consult documentation on the specific repeater s in use for the delay that it may impose If that information is not available allow a nominal 7 bit time delay for a regenerative repeater Allow a nominal 4 bit times for carrier modulation demodulation delay in an amplifier repeater OPEN 1 CLOSE 0 L CODE SYSTEM TYPE NO RESPONSE TIMEOUT Figure 2 6 SW7 Switch Assignments CPU B 6408F p 2 8 ies NO RESPONSE NO RESPONSE 6 5 TIMEOUT MS TIMEOUT MS OOGOGOOOOGOO OOOGOOGOCOCO OOOOOOOO 2000090900 OOOOOOCQOCQO OOOOOdO0O0cdQ C C C C C e C C CO CO C O CO Figure 2 7 No Response Timeout Options 8 7 6 5 43 2 1 OPEN lt 1 CLOSE 0 L CODE LINE BAUD RATE i STOP BIT SELECT PARITY ENABLE PARITY SELECT RESERVED Figure 2 8 SW8 Switch Assignments CPU B 6408F p 2 9 SW8 CODE LINE SW8 CODE LINE 4 3 2 l BAUD RATE 4 33 21 BAUD RATE C C CO O Cc 00 cc CO OC 00 90000000 OOOOGOGOGOAO OOGOGOOOAO OOOGOOGOOO cc C C 32 C C CO C O CO CO Figure 2 9 Baud Rate Options SW8 PARITY STOP BIT 765 SELECTIONS ONE STOP BIT TNO STOP BITS DISABLE PARITY ENABLE ODD PARiTY ENABLE EVEN PARITY Figure 2 10 Parity Stop Bit Options 6408F p 2 10 8 7 6 5 4 3 2 1 ski au L TRANSMITTER KEY ON DELAY TRANSMITT
10. at the end of a command line characters on the line may be corrected through the use of the delete RUBOUT or backspace key The delete causes the character immediately to the left of cursor to be ignored by the PRCCI The resulting display is determined by the SET CRT command A partially entered command line may timeout and be ignored by the PRCCI after approximately twenty 20 seconds of inactivity The maintenance session recognizes control Q and control S as XON XOFF flow control characters This provides a hold screen feature that is useful for reviewing reports that scroll off a CRT screen Control C is recognized as an interrupt character It may be used to abort any command or report and return the user to the command line prompt For compatibility with the office protocol these features are only enabled while a session is opened 6 2 NUMERIC CCDE LINE INFORMATION Decimal hexadecimal binary and various native formats are available for the entry and display of numeric fields that represent code line address control and indication information The native formats are 6408F p 6 1 essentially binary except that specific alphabetic characters replace the usual 1 and 0 The formats are selected with the SET FORMAT command Fields for numeric code line information are divided into groups of eight bits or 1 byte and may be represented by a value from 0 to 255 decimal Certain commands may further restrict the value of so
11. first transition is called the start bit During the next eight bit times the circuit transitions between MARK and SPACE as required to represent the character The least significant bit of the character is transmitted first The circuit is then forced to the MARK state for a minimum of one bit time This final state is called the stop bit Its primary functions are to frame the transmitted character and to ensure that the next start bit may be recognized as a MARK to SPACE transition Figure 2 14 depicts the asynchronous character format utilized on the circuit 6408F p 2 12 8 DATA BITS 3 MARK V pq a IS pompe q TE IDLE MSB SPACE V a del qoe l J START STOP BIT BIT Figure 2 14 Asynchronous Character Format Office As discussed in the Hardware Description and Installation service manual these channeis are RS232C compatible Figure 2 15 provides interface specifications for the available signals In figure 2 16 a typical office interface is shown using multiple remotely located PRCCI units connected through an EIA bridge to a modem 6408F p 2 13 Es STATE VOLTAGE DIRECTION TXD MARK 3 TO 15 OUTPUT TRANSMIT DATA SPACE 3 TO 15 RXD 3 TO 15 INPUT RECEIVE DATA ice 3 TO 15 RTS OFF 3 TO 15 OUTPUT REQUEST TO SEND ON 3 TO 15 CTS OFF 3 TO 15 INPUT CLEAR TO SEND ON 3 TO 15 DSR OFF 3 TO 15 INPUT DATA SET READY ON 3 TO 15 zem mm p ea
12. indication record 04 station in monitor 06 station failed 01 7F station address 01 21 indication data byte count 00 1F E0 indication byte number 00 FF indication byte data n 2 00 FF CRC 16 low byte n 1 00 FF CRC 16 high byte n F6 ETX 6408F p 7 5 tered w snl teed w end 7 3 5 Local Indication Byte Range F2 01 FF 00 00 FF 00 FF 00 FE F6 W OY Un RUDE 7 3 6 Acknowledge Byte Range 1 F1 2 01 FF 3 F6 Description message header PRCCI address indication byte number indication byte data CRC 16 low byte CRC 16 high byte ETX Description message header PRCCI address ETX 7 4 PRCCI TO GENISYS MESSAGES 7 4 1 Poll Secure format Byte Range FB 01 FF 00 FF 00 EF F6 Un amp Lo ha Non secure format Byte Range 1 FB 2 01 FF 3 F6 7 4 2 Acknowledge And Byte Range 1 FA 2 01 PF 3 00 FF 4 00 FF 3 F6 Description message header GENISYS address CRC 16 low byte CRC 16 high byte ETX Description message header GENISYS address ETX Poll Description message header GENISYS address CRC 16 low byte CRC 16 high byte ETX 6408F p 7 6 7 4 3 Control Request Byte Range Description 1 FC message header 2 01 FF GENISYS address 00 1F control byte number 00 FF control byte data n 2 00 FF CRC 16 low byte n 1 00 FF CRC 16 high byte n F6 ETX 7 4 4 Execute Control Byte Range Description
13. number of control and indication address steps is fixed at eight 6 4 11 2 SHOW CONTROL Syntax SHOW CONTROL control address The SHOW command entered with the CONTROL option displays current control images stored by the PRCCI If the optional control address is specified only the image for that station is displayed If omitted a report containing the current image for all stations is displayed 6 4 11 3 SHOW ERRORS Syntax SHOW ERRORS indication address The SHOW command entered with the ERRORS option displays the current number of code line errors detected by the PRCCI If the optional indication address is specified only the error counter associated with that station is displayed If omitted a report containing the error counters for all stations and a total number of code line errors is displayed 6 4 11 4 SHOW FORMAT Syntax SHOW FORMAT The SHOW command entered with the FORMAT option displays the current format selected for the entry and display of numeric code line information 6 4 11 5 SHOW INDICATION Syntax SHOW INDICATION indication address The SHOW command entered with the INDICATION option displays current indication images stored by the PRCCI If the optional indication address is specified only the image for that station is displayed If omitted a report containing the current image for all stations is displayed 6408F p 6 13 6 4 11 6 SHOW LINE Syntax SHOW LINE The SHOW command entered with the
14. that only that specific value is permitted Multiple numbers separated by a comma indicates that only those specific values are permitted Two numbers separated by a dash indicate the lower and upper limits for the field Any restrictions within the given limits are noted in the description of the field 7 2 OFFICE TO PRCCI MESSAGES 7 2 1 POLL Secure format Byte Range Description 1 FB message header 2 01 FF PRCCI address 3 00 FF CRC 16 low byte 4 00 FF CRC 16 high byte 5 F6 ETX Non secure format Byte Range Description 1 FB message header 2 01 FF PRCCI address 3 F6 ETX 6408F p 7 1 7 2 2 Acknowledge And Poll Byte Range 1 FA 2 01 FF 3 Q0 FF 4 00 FF S F6 Description message neader PRCCI address CRC 16 low byte CRC 16 high byte ETX 7 2 3 PRCCI Initialization Range w W 00 4 OY OU 4 CO PO i 4 C rp ro O pa b N o r c gt he J Or Cn amp WN e o I re raj Description message header PRCCI address auxiliary header code system type maximum indication records per message maximum control queue entries maximum station address number of station retries per set number of station retry sets maximum control byte number maximum indication byte number reserved for future use reserved for future use EO control byte mask CRC 16 low byte CRC 16 high byte ETX 7 2 4 Set Status Control Register Range F7 01 FF AS UJ WN r et O
15. the user was rejected Code line requests include the DISCONNECT RECALL RESET and SUPPRESS commands A request that is not supported by the application causes this error the request is supported verify that any address specified in the command line if applicable is legal for the code line and that the proper format is being used This error may be occassionally generated if tha office computer system has a number of code line requests queued Normally this is a temporary condition that lasts for only a brief period and is indicated by messages displayed on the front panel of the PRCCI Simply enter the request after the queued requests have been transmitted ERROR Required option or argument is missing An key word or argument required by the command syntax was omitted from the command line Check the syntax of the particular command by using the HELP command or refer to this manual ERROR Unrecognized command or option Characters entered on the command line could not be identified as any known command or option to a particular command Check the syntax of the particular command by using the HELP command or refer to this manual 6408F p 6 16 No free address slots for trace The maximum number of address filter masks have already been entered for a particular message type All previous filter masks associated with the message type must first be removed with the SET NOTRACE command The new mask may then be entered
16. transmission Typically a nominal 4 bit times is recommended to compensate for carrier turn on delay The key on delay may have to be lengthened to compensate for any additional delays imposed by modems repeaters leased circuits or microwave equipment Figures 2 11 and 2 12 list the switch assignments and their options A typical repeater characteristically delays and shortens the carrier key on signal RTS by some pre determined time This time is typically measured in bit times and is specific to the type of repeater used Consult documentation on the specific repeater s in use for the delay times imposed If that information is not available allow a nominal 3 bit time delay for an amplifier repeater and a nominal 7 bit time delay for a regenerative repeater 6408F P 2 7 2 3 3 Transmitter Key off Delay Selection The transmitter key off delay imposed by the PRCCI on the field communicat n J3 channel must be programmed into SW9 This parameter determines he time between the end of data transmission and the de assertion of request to send RTS Typically a nominal 4 bit times is recommended to ensure that all data bits have been transmitted on the carrier circuit and to help prevent transients that could reduce data integrity The key off delay may have to be lengthened to compensate for any additional delays imposed by modems repeaters leased circuits or microwave equipment Figures 2 11 and 2 12 list the switch assignments
17. ANNAN GA Qy GA GA OY O Qy on dh 0A A o a e e e Ne P amp P P b PP Pa bh j gt j j gt RR Q PO A SECTION VII IA 7 2 OY Us da L2 Mr gt Pp P e e e Q gt P P e HL j 4 Qn CA On YN UN Un Un amp amp j gt e e lt Q Ul amp amp amp amp WW CU C9 CO US h9 r Cn amp WN o Ww 0 3 Oh U gt CO F Oo UN amp W IX I WN Local Control Checkback Conzzol Checkback Sta is Indication Resi ster Data Inc ation Bags Re y Local Indication Acknowledge STATUS CONTROL AND INDICATION REGISTERS Status Control Register 0 Status Indication Register 0 Status Control Indication Register l Status Control Indication Register 2 Status Control Indication Register 3 Status Control Indication Register 4 FIELD INFORMATION EXCHANGE OVERVIEW PHILOSOPHY AND SECURITY PRCCI GENERATED MESSAGES Poll i Acknowledge and Poll gt Indication Recall Control Request Execute Control GENISYS GENERATED MESSAGES Control Checkback Indication Acknowledge POLLING CYCLE DESCRIPTION EO BYTE DESCRIPTION MAINTENANCE SESSION OVERVIEW NUMERIC CODE LINE INFORMATION OPENING A MAINTENANCE SESSION COMMAND DESCRIPTIONS CLEAR DISCONNECT HELP HISTORY LOGIN ek OEC Eo TS cA Ds en LOGOUT fa Adeo II e Z RE Sd MONITOR owe RECALL os OR Re a q a OS is RESET 9 s s Weg SET a rs a 4 o a AR SHOW
18. C 16 is generated from the header address and data portion prior to any possible data escape sequences being introduced Only the message 6408F p 4 l header and terminator chrracters are excluded from any possible data escape sequence In general messages are issified according to function with a unique header character for sach class Certain classifications employ auxiliary header characters appearing after the address These denote specific functions within a classification which contains multiple messages Figure 4 1 summarizes by classification the messages sent by the office to the PRCCI Figure 4 2 summarizes those sent by the PRCCI to the office MSG HDR AUX HDR FUNCTION PRCCI INITIALIZATION INDICATION DATABASE REQUEST STATUS INDICATION REGISTER REQUEST SET STATUS CONTROL REGISTER A7 E RESERVED AA ER CONTROL REQUEST E ES Rana CONTROL Efe CEI fe ewe um Em ETE Im eee ear coma Figure 4 1 Office Generated Messages 6408F p 4 2 MSG AUX HDR HDR FUNCTION E Tana ENEE LOCAL INDICATION MEN LOCAL CONTROL CHECKBACK ra STATUS INDICATION REGISTER DATA MEN INDICATION MEN CONTROL CHECKBACK Figure 4 2 PRCCI Generated Messages 4 3 OFFICE GENERATED MESSAGES This section discusses the function and implementation of messages exchanged between an office computer system and a GENISYS PRCCI T
19. CTURE FLOW OF INFORMATION INSTALLATION APPLICATION FIRMWARE CPU A CONFIGURATION PRCCI Address Selection Office Baud Rate Selection Office Transmit Key on Delay Selection i Office Transmit Key off Delay Selection CPU B CONFIGURATION Code System Type No Response Timeout Selection Baud Rate Selection Stop Bit Selection Parity Enable Disable Parity Selection Transmitter Key on Delay Selection Transmitter Key off Delay Selection CTC OFFICE INTERFACE dra CODE LINE INTERFACE LOCAL CONTROLS AND INDICATIONS OPERATION OVERVIEW FUNCTION LED DESCRIPTIONS OUTPUT LED DESCRIPTIONS INPUT LED DESCRIPTIONS OPERATIONAL MESSAGES ERROR MESSAGES OFFICE INFORMATION EXCHANGE OVERVIEW PHILOSOPHY AND SECURIT TY OFFICE GENERATED MESSAGES Poll up Acknowledge And Poll PRCCI Initialization Set Status Control Register Status Indication Register Request Indication Database Request Local Control Request Execute Local Control Local Indication Recall Control Request Execute Control Indication Recall PRCCI GENERATED MESSAGES iii sa S2 fS2 PO NNN P9 P9 P9 PO NNN NP PO L o E 1 e e P P Pp P P Pp P P bP Lb j gt i 4 6 d HNN Q 4 N N O n n UN NN P9 4 LL f 440 144 4 4 0 IIIIRDAARA On amp W W Uy rn FA SECTION lt cn n un Qu Un Cn Un Cp Un On UN UN Cn Un SECTION VI
20. DCD OFF 3 TO 15 INPUT DATA CARRIER DETECT ON 3 TO 15 DTR OFF ET TO 15 OUTPUT DATA TERMINAL READY ON 3 TO 15 NOTES 1 VOLTAGES REFERENCED TO SIGNAL GROUND 2 DATA STATE IS UNDEFINED IN TRANSITIONAL REGION BETWEEN 3 AND 3 VOLTS Figure 2 15 RS 232C Compatible Interface Specifications 6408F p 2 14 PRCCI 1 PRCCI 2 NOTES 1 A STANDBY MODEM AND EIA BRIDGE MAY BE WIRED IN SIMILAR FASHION TO THE J2 CONNECTOR S 2 ONLY TXD RXD AND SIGNAL GROUND ARE REQUIRED FOR MINIMAL INTERFACE OTHER INPUT SIGNALS ARE INTERNALLY ASSERTED WHEN NOT WIRED Figure 2 16 Remote Installation Using Multiple PRCCI Units 6408F p 2 15 2 5 CODE LINE INTERFACE The interface to the code line communication equipment is provided at connector J3 FIELD COMM located at the rear of the unit It may be configured as either an RS 232C level or a current loop interface depending upon the type of communication equipment used at the installation The RS 232C level interface is recommended and should be used in all installations whenever possible It is by far the most common carrier interface and allows a wide variety of data monitoring equipment to be used on the communication circuit Figure 2 15 provides specifications for this interface Figure 2 18 shows a typical EIA level interface between a GENISYS PRCCI and carrier equipment Where only TTL level carrier is available the current loop option pro
21. ER KEY OFF DELAY Figure 2 11 SW9 Switch Assignments CPU B SW9 KEY ON DELAY SW9 KEY OFF DELAY 4321 BIT TIMES 8 7 6 5 BIT TIMES C O C O C O C O e O C O E O C O OOOOOOOOGOGOOOGOOANA OOOOGOOGOGOAOOOCOGOONOAO OOGOGOOCOCOGOGOCGOOOCOOO ononononononoaoO C C C C C C C C O C C O coc coc coo coo occ occ oco oco O o C O oC 000 000 Figure 2 12 Transmitter Key on off Delay Options 6408F p 2 11 BAUD RATE BIT TIME BITS SEC MS BIT E Figure 2 13 Bit Time Table 2 4 CTC OFFICE INTERFACE The CTC office system communicates with a PRCCI over either a normal or standby asynchronous serial channel Both are available at connectors Ji NORMAL and J2 STANDBY MAINT located at the rear of the unit The office protocol is only permitted to be active on one channel at a time The standby channel when not active with the office protocol may be connected to an ANSI standard terminal to access the maintenance session This channel functions in only one mode at a time The office protocol regardless of whether a maintenance session is opened or not always takes precedence Both channels utilize a word format of 1 start bit 8 data bits no parity and 1 stop bit The baud rate is selectable with DIP switches and both operate at the same speed The transmission of a character requires that the circuit transition from an idle MARK state to the SPACE state for one bit time This
22. I include 1 SIR data 2 Acknowledge ACK 4 3 9 Local Indication Recall The local indication recall message is generated to request the current local indications from the PRCCI The PRCCI is only permitted to respond with 6408F p 4 6 1 SIR data 2 Local indication 4 3 10 Control Request The control request message is generated to request that the PRCCI transmit a control message to the field This message specifies the field code unit address the number of control bytes in the request as well as each control byte number and current control byte data If control checkback is enabled the only legal response is a control checkback message When checkback is disabled valid responses from the PRCCI include SIR data Indication Local indication Acknowledge ACK iu N 4 3 11 Execute Control The execute control message is generated to execute a control request that had been previously verified with a checkback message from the PRCCI Thi3 message must immediately follow the control checkback or the office must repeat the sequence beginning with a retry of the control request This message is illegal if control checkback is disabled Valid responses from the PRCCI include 1 SIR data 2 Acknowledge ACK 4 3 12 Indication Recall The indication recall message is generated to request that the PRCCI recall current indications from the specified field code unit The indications received by the PRCCI in response t
23. LEAR command entered with HISTORY option causes historical information to be purged from the specified history queue If no queue type is specified all history queues are purged 6 4 2 DISCONNECT Syntax DISCONNECT The DISCONNECT command typically performs a code line disconnect function The GENISYS code system does not provide this capability an therefore this command has no function in this PRCCI application 6 4 3 HELP Syntax HELP command The HELP command provides a summary of the syntax for all maintenance commands and their associated options This command accepts as an option a command name and provides detailed help on that command s syntax If the command name is abbreviated help is provided on all commands that match 6408F p 6 4 6 4 4 HISTORY Syntax HISTORY option FIELD OFFICE TIME The HISTORY command generates a historical report on various types of information exchanged through and obtained by the PRCCI All historical information is stored in circular queues In this type of storage structure the oldest information stored is discarded as new information is inserted These queues are continuously updated and function independently of any monitor or trace functions 6 4 4 1 HISTORY FIELD Syntax HISTORY FIELD The HISTORY command entered with the FIELD option generates a historical report of the most recent field requests and indications exchanged between the PRCCI and the field code units For eac
24. LINE option displays the current line maintenance state selected for the field communication channel 6 4 11 7 SHOW REVISION Syntax SHOW REVISION The SHOW command entered with the REVISION option displays the current revision level of the firmware installed on both CPU A and CPU B Also displayed is the code system type being emulated and a checksum of the EPROM set installed in each cpu board 6 4 11 8 SHOW SCR Syntax SHOW SCR scr number The SHOW command entered with the SCR option displays the contents of one or all status control registers If the optional SCR number is specified only the contents of that register are displayed If omitted a report is displayed containing the contents of all status control registers defined by this PRCCI application The SCR number is always entered and displayed in hexadecimal The contents of a SCR are displayed in both hexadecimal and binary 6 4 11 9 SHOW SIR Syntax SHOW SIR sir number The SHOW command entered with the SIR option displays the contents of one or all status indication registers If the optional SIR number is specified only the contents of that register are displayed If omitted a report is displayed containing the contents of all status indication registers defined by this PRCCI application The SIR number is always entered and displayed in hexadecimal The contents of a SIR are displayed in both hexadecimal and binary 6 4 11 10 SHOW TIME Syntax SHOW TIME indic
25. NO CODE TYPE No code type has been programmed into DIP switch SW7 on CPU B The PRCCI allows the watchdog timer to trip and reset CPU B until the condition is corrected Refer to Section 2 3 CPU B Configuration for programming information WRONG CODE TYPE The wrong code system type has been programmed into DIP switch SW7 on CPU B The PRCCI allows the watchdog timer to trip and reset CPU B until the condition is corrected Refer to CPU B configuration section 1 4 for programming information INTERNAL ERR This message indicates that CPU B detected errors in communication with CPU A While a limited failure of communication hardware on CPU B could result in this error the typical cause is a hardware or software failure of CPU A This condition should never occur with an in service installation 6408F p 3 5 SECTION IV OFFICE INFORMATION EXCHANGE 4 1 OVERVIEW The scheme for communication with the office computer system is similar to that used on a half duplex code line circuit where the office is the master to one or more slave PRCCI units The protocol is designed to complement that used by the Union Switch amp Signal GENISYS Non vital Logic Emulator This permits multiple PRCCI and GENISYS units to co exist on the same communication circuit Any GENISYS units must appear as slaved field code units All conversations on this circuit are initiated by the office and only the addressed unit is permitted to respond If the uni
26. T FORMAT Syntax SET FORMAT format code BINARY DECIMAL HEXADECIMAL LS HL LH MS SM The SET command entered with the FORMAT option allows the user to specify the format used for entering and the display of numeric code line information The two character key words used to select the native formats are designed so that the left character represents a binary 1 while the right represents a 0 Mark space terminology is selected with the key words MS or SM while high low terminology is selected with HL or LH Long short terminology is selected with the key word LS For proper representation of control and indication data in a native format the selection of either MS or HL is recommended 6 4 10 3 SET LINE Syntax SET LINE state CYCLE NOREST NORMAL REST The SET command entered with the LINE option allows the user to apply various carrier frequency shifts to the code line for the purpose of line maintenance The key word CYCLE specifies that a 50 duty cycle is to be transmitted for an indefinite period of time This duty cycle consists of shifts between MARK and SPACE at the current baud rate The key word REST specifies that a MARK is to be transmitted for an indefinite period of time The key word NOREST specifies that a SPACE is to be transmitted for an indefinite period of time The key word NORMAL specifies that normal operation is to be resumed If initialized the PRCCI delays briefly before it resumes th
27. UNCTION B This LED denotes a STANDBY PORT ACTIVE function When illuminated it indicates that the office is communicating with the PRCCI over the standby channel FUNCTION C This LED denotes a MAINTENANCE SESSION ACTIVE function When illuminated it indicates that a maintenance session is opened FUNCTION D This LED is a hardware indication of the 5 volt output from the PRCCI power supply and should be illuminated constantly 3 3 OUTPUT LED DESCRIPTIONS The LEDs in this group are state indicators for each of the local control outputs While the outputs themselves are under software control these LEDs reflect the actual hardware state of the output module control circuits They should normally remain dark and flash only when the associated local control is delivered 3 4 INPUT LED DESCRIPTIONS The LEDs in this group are hardware driven state indicators for each of the local indication inputs When illuminated they indicate that energy is applied to the associated input 6408F p 3 2 3 5 OPERATIONAL MESSAGES EMULATE GENISYS This message is displayed upon power up reset and initialization from the office computer system Following initialization this message is normally replaced with other operational messages or station addresses are displayed as the polling cycle progresses CONTROL NN This message indicates that the PRCCI is transmitting a control to station address NN The message is displayed during the contro
28. are address bit Other formats inhibit the use of any don t care bits and ignore those that may have previously existed The tracing of time performs no function in this PRCCI application 6408F p 6 11 6 4 10 7 SET NOTRACE Syntax SET NOTRACE argil CONTROL INDICATION TIME The SET command entered with the NOTRACE option turns off the message trace and disables any address filters associated with the specified message type The message type is optional and if omitted all message types are affected 6 4 10 8 SET TRIGGER Syntax SET TRIGGER station number The SET command entered with the TRIGGER option is typically used to enable or disable a roll call trigger The SET command entered with the TRIGGER option performs no function is this PRCCI application 6 4 11 SHOW Syntax SHOW option argl arg2 ADDRESS CONTROL control address ERRORS indication address FORMAT INDICATION indication address LINE REVISION SCR scr number SIR sir number TIME indication address TRACE argl TRIGGER The SHOW command generates various reports and displays a variety of operating parameters and characterstics 6 4 11 1 SHOW ADDRESS Syntax SHOW ADDRESS 6408F p 6 12 d The SHOW address command entered with the ADDRESS option displays the number of address steps used for control and indication stations This function is primarily intended for use in relay code system applications In this application the
29. as UNION SWITCH 7 SIGNAL INC SERVICE MANUAL 6408F 5800 Corporate Drive Pittsburgh PA 15237 Description Installation and Operation PRCCI PROGRAMMABLE REMOTE CODE TO COMPUTER INTERFACE US amp S GENISYS APPLICATION March 1990 A 3 90 50 2917 1 ANSALDO COPYRIGriT 1990 ONION s 4 SIGNAL INC PANICO IN USA This document contains information which is proprietary to Union Switch amp Signal Inc furnished to you on the following conditions no right or license In respect of this document or its contents is given or waived in supplying this document to you This document or its contents are not to be used or treated in any manner inconsistent with the rights and interests of Union Switch amp Signal Inc or to its detriment and are not to be copied reproduced disclosed to others or disposed of except with prior written consent Revised and new pages of thi3 manual are listed by page number and date Page No Date Page No Date Y ii SECTION SECTION SECTION SECTION I r2 r7 qa amp w Ne tA HA III WWW C9 WwW CO OY UN da CU hn Lam lt FO NN NN NM tQ P9 FS FS P9 PO DN NN P9 P9 OQ Ui 4 CO GJ GO W CO CO C9 CO CO f N DN N hn OO Y Nh UN amp C IN r WEN SEM P PP P P P Pp P m P PP PS E bb gt BR US GJ CO Q G Q2 CO Y Ww Y CO CO WD Oo 0 J Y UN amp CO DI A W N to gt ro GENERAL INFORMATION INTRODUCTION OVERVIEW ARCHITE
30. ation address 6408F p 6 14 The SHOW command entered with the TIME option displays current indication timing stored by the PRCCI If the optional indication address is specified only the timing for that station is displayed If omitted a report containing the current timing for all stations is displayed This command performs no function in this PRCCI application 6 4 11 11 SHOW TRACE Syntax SHOW TRACE arg1 CONTROL INDICATION TIME The SHOW command entered with the TRACE option displays the types of field messages selected for monitoring when the field monitor function is active If enabled with the MONITOR AUTOMATIC command the automatic field monitor feature is indicated with any associated message types Any address filter masks associated with a traced message type are displayed in the current format If the optional message type is specified only information on that particular message type is displayed 6 4 11 12 SHOW TRIGGER Syntax SHOW TRIGGER The SHOW command entered with the TRIGGER option displays the indication station number selected for the roll call trigger The station number refers to the roll call address and is displayed in decimal It should be noted that the associated SET command entered with the TRIGGER option performs no function is this PRCCI application 6 4 12 SUPPRESS Syntax SUPPRESS The SUPPRESS command typically causes a station suppression function to be performed The GENISYS code syste
31. be reflected in site specific plans SW9 is not used and all switches should be placed in the closed position The PRCCI must be reset for any switch changes to take effect 2 2 1 PRCCI Address Selection The address assigned to the PRCCI must be programmed into SW7 It is entered as an eight bit binary value between 1 and 255 decimal An address of zero all switches closed is illegal Figures 2 1 and 2 2 give the binary weighted values of the switches in SW7 and some examples of address selections 2 2 2 Office Baud Rate Selection The baud rate used to communicate with the office must be programmed into SW8 The rate selected is used on both the normal Jl and standby maintenance J2 channels Figures 2 3 and 2 4 list the switch assignments and their options 2 2 3 Office Transmit Key on Delay Selection The key on delay time used in communication with the office must be programmed into SW8 The delay time selected is used in the transmission of responses to the office on the both the normal Jl and standby maintenance J2 channels This parameter measured in bit times determines the time between the assertion of request to send RTS and the beginning of data transmission A nominal 4 bit times is recommended to compensate for carrier turn on delay The key on delay may have to be lengthened to compensate for any additional delays imposed by modems repeaters leased circuits or microwave equipment Figures 2 3 and 2 5 list t
32. capable of transmitting a control message upon request from the office and does not attempt to filter changes in control data It transmits all control data requested by the office regardless of whether or not there is actually a change of state Under normal circumstances only the control data specified in a control request is transmitted The exception to this is when the PRCCI detects that a station s control database is incomplete When this occurs the PRCCI waits for the next office control to that station and proceeds to transmit all valid control bytes regardless of whether or not all were requested If control checkback is enabled the only legal response is a control checkback message When checkback is disabled either an indication or acknowledge is a valid response to this message 5 3 5 Execute Control The execute control message is generated to request that a GENISYS execute a control request that had been previously verified with a checkback message from the unit This message must immediately follow the control checkback or the PRCCI must repeat the sequence beginning with a retry of the control request This message is illegal if control checkback is disabled Either an indication or acknowledge is a valid response to this message 6408F p 5 3 5 4 GENISYS GENERATED MESSAGES 5 4 1 Control Checkback The control checkback message is generated as part of the veritication procedure for control delivery It is only legal in res
33. certain maintenance functions Enable secure poll This flag is set to force the PRCCI to accept only secure poll messages from the office If this flag is cleared the PRCCI will accept either secure or non secure polls It is cleared on reset and initialization Enable control checkback This flag is set to enable control checkback mode for all control and local control reguests from the office It is cleared on reset and initialization Enable alternate line rate This flag is set to instruct the PRCCI to use the alternate line rate for field communication It is normally cleared on reset and initialization to default to the normal line rate The normal line rate is specified in SCR SIR 3 while the alternate is specified in SCR SIR 4 Enable alternate timing parameters Reserved flag Return bad indications Reserved flag 6408F p 4 10 4 5 4 Status Control Indication Register 2 Reserved for future use 4 5 5 Status Control Indication Register 3 These registers typically select and indicate the normal baud rate for field communication The GENISYS PRCCI application does not permit the office to alter this DIP switch selected parameter 4 5 6 Status Control Indication Register 4 These registers typically select and indicate the alternate baud rate for field communication The GENISYS PRCCI application assigns the alternate rate to be the same as the DIP switch selected normal rate As with the normal rate the off
34. ction of 2 stop bits may become necessary when certain types of repeaters are in use on the code line These devices may clip and shorten a single stop bit preventing successful communication between the PRCCI and the field code unit s For proper operation a minimum of 1 5 stop bits must be received by the PRCCI when the 2 stop bit option has been selected 2 3 5 Parity Enable Disable The use of parity on the field communication J3 channel must be programmed into SW8 By placing SW8 6 in the closed position parity generation and checking is disabled By placing SW8 6 in the opened position parity generation and checking is enabled Figure 2 8 shows this switch in the closed position since parity is not typicaly enabled on GENISYS code lines installed by US amp S 2 3 6 Parity Selection The type of parity implemented on the field communication J3 channel must be programmed into SW8 if the use of parity has been enabled By placing SW8 7 in the closed position odd parity is selected By placing SW8 7 in the opened position even parity is selected Figure 2 8 shows this switch in the closed position as a default since parity is not typically enabled 2 3 7 Transmitter Key on Delay Selection The transmitter key on delay imposed by the PRCCI on the field communication J3 channel must be programmed into SW9 This parameter measured in bit times determines the time between the assertion of reguest to send RTS and the beginning of data
35. d in the last response from the station Hardware level errors include parity framing or overrun loss of data errors A limited number of these errors over a period of time is to be expected and does not necessarily indicate improper operation of the code line Should the number of these errors reach an unacceptable level it should be considered an indication of poor line quality communication equipment failure or fieid unit failure This error flag may appear on the front panel immediately to the right of the station address It indicates that a monitor condition has been declared for the station due to repeated protocol or hardware level errors Protocol level errors include an illegal message header illegal CRC 16 illegal message length illegal station address illegal responses control checkback errors and no response timeouts A limited number of these errors over a period of time is to be expected and does not necessarily indicate improper operation of the code line Should the number of these errors reach an unacceptable level it should be considered an indication of poor line quality communication equipment failure or field unit failure This error flag may appear on the front panel immediately to the right of the station address It indicates that a failed condition has been declared for the station due to repeated protocol or hardware level errors This condition indicates either a failure of the communication circuit
36. database complete flag is de asserted or the state of any other flags in the byte do not match the office specified states EO BYTE FLAGS L DATABASE COMPLETE ENABLE CHECKBACK ENABLE SECURE POLL RESERVED Figure 5 3 E0 Byte Flags 6408F p 5 5 SECTION VI MAINTENANCE SESSION 6 1 OVERVIEW The maintenance session provides the capability through an ANSI standard terminal to monitor message traffic and performance of both the office communication channel and field code line Interactive diagnostic tools allow the user to locally generate a limited number of code line messages review various reports as well as examine or temporarily alter certain operating characteristics Access is restricted by two protection mechanisms The address of the unit and a password must be properly specified in order to open a session A11 units employ the same password which may not be altered A maintenance command consists of one or more words possibly followed depending upon the command by one or more numeric values Only one command may be entered on a line and each line must be terminated with a carriage return Numeric values may typically be entered in decimal hexadecimal binary or the native language of the coding equipment In general the format is selectable by the user but restrictions do apply to certain commands These restrictions are noted in the respective command descriptions Prior to entering the carriage return
37. desses SUPPRESS es ERROR MESSAGES SUPPLEMENTAL INFORMATION CONVENTIONS OFFICE TO PRCCI MESSAGES iv og Pi po OD ww 0 09 00 Q0 OU LJ od A es e j e jc Q gt j G gt i mo oo 80 8 l 1 be amp P P gt AR Www C Ww CO ps pe e Un n Un n Gn in Cn Cn e J UY UN CA CA i Oven un di qv YO OY eie dq 14 04514 Ww 0 Q OY Q Ul Aa e WANE Pr t c n N 6 15 q Y Y 3 NNN J J SY J J J 4 J Y Y Y Y Y J Y Y Y Y o Qn n n n amp amp de amp D e GO CO GO GO CO CO CO SN IN 2 S NN NN ND PD bo w 00 QY Cn RUDE Din 4 CA Ha CA da WN 5 Poll S ME E Acknowledge Ando Poll oy d Net ua PRCCI Initialization Set Status Control Register Indication Database Request Local Control Request Execute Local Control Local Indication Recall 10 Control Request 11 Execute Control 12 Indication Recall PRCCI TO OFFICE MESSAGES Local Control Checkback Control Checkback Status Indication Register Data Indication Ser TE ie M Local Indication Acknowledge PRCCI TO GENISYS MESSAGES Poll e Acknowledge And Poll Control Request Execute Control Indication Recall GENISYS TO PRCCI MESSAGES Control Checkback Indication Acknowledge w N gt Status Indication Register Request Y 333 J J t J J J J J J J J J Y J Y Y Y Y A Y Y Y Y
38. e information in this manual supplements service manual 6408 Hardware Description and Installation with information on firmware installation DIP switch programming communications and general operation The term application as used by this manual refers to a PRCCI applied to any GENISYS code line The term installation refers to a PRCCI applied to a specific code line at a specific site The term office refers to the CTC office computer system 1 2 OVERVIEW The PRCCI is a microprocessor based device whose primary purpose is to logically interface a CTC office computer system to a single field code line The unit serves as the mechanism by which the office delivers control information and receives indication information The unit once initialized functions independently of the office and may directly manipulate the code line interface without intervention from the office Manipulation of the code line interface to transmit and receive information is transparent to the office The office itself is only concerned with the buffered information that represents code line data Control information from the office is buffered by the PRCCI until such time that it can be transmitted on the code line Indication information from the code line as well as certain types of status information is also buffered by the PRCCI until such time that it can be transmitted to the office 1 3 ARCHITECTURE The PRCCI design incorporates a dual micro
39. e polling cycle and transmits any pending requests 6408F p 6 10 6 4 10 4 SET SCR Syntax SET SCR scr_number mask The SET command entered with the SCR option may be used to alter the contents of a status control reqister Both the SCR number and the mask to be loaded into the register must be entered in hexadecimal 6 4 10 5 SET SIR Syntax SET SIR sir number mask The SET command entered with the SIR option may be used to alter the contents of a status indication register Both the SIR number and the mask to be loaded into the register must be specified in hexadecimal 6 4 10 6 SET TRACE Syntax SET TRACE argl arg2 CONTROL control address INDICATION indication address TIME indication address The SET command entered with the TRACE option turns on the message trace associated with the specified message type The message trace determines whether or not a particular message type is monitored by the field monitor function The second argument specifies an optional address filter mask The address filter is used to selectively monitor messages containing certain station addresses Up to eight masks may be specified for a message type using individual commands If the mask is omitted from the command line the filter is disabled and all messages of the given type are monitored The filter mask must be specified in the currently selected format This function accepts in binary or a native format only an X asa don t c
40. enance sessions on a channel 6 4 6 LOGOUT Syntax LOGOUT The LOGOUT command closes the current maintenance session 6 4 7 MONITOR Syntax MONITOR option NO AUTOMATIC FIELD OFFICE The MONITOR command allows either office or field message traffic to be monitored on the maintenance terminal The maintenance session is essentially placed in a datascope mode while this function is active Only control characters entered from the terminal keyboard are processed and echoed while the monitor function is active Printable characters entered from the keyboard result in a warning bell This feature allows carriage return RETURN ENTER or control M and form feed control L characters to be entered to manipulate a printer carriage from the terminal keyboard The monitor function is terminated with the control C interrupt 6 4 7 1 MONITOR AUTOMATIC Syntax MONITOR AUTOMATIC MONITOR NOAUTOMATIC 6408F p 6 6 The MONITOR command entered with the AUTOMATIC or NOAUTOMATIC option selects whether or not the PRCCI may automatically activate the field monitor function when a RECALL command is entered by the user The selection of AUTOMATIC allows the PRCCI to automatically activate the field monitor function upon successful completion of a RECALL command This feature requires that an indication or time message trace must be previously selected with the SET TRACE command The monitor function operates in the normal fashion and may be term
41. es at approximately 46 900 miles second or about 2 13 milliseconds for every 100 miles 5 Leased telephone circuits may impose additional delays The characteristics and magnitude of such delays may be specific to the supplier Under normal circumstances this calculation should be based on the maximum allowable delay as prescribed by current tariff regulations 6 Any other possible source of carrier delay such as a microwave link that is unique or specific to the installation If such a source exists be sure to consider the maximum delay that could be imposed not just an average delay 2 3 3 Baud Rate Selection The baud rate used by the PRCCI to communicate on the field communication J3 channel must be programmed into SW8 The rate selected is used as both the normal and alternate baud rate in communication with the field code units Programming is dictated by the installation and should be reflected in site specific plans Figures 2 8 and 2 9 list the switch assignments and their options 6408F p 2 6 2 3 4 Stop Bit Selection The number of stop bits used by the PRCCI to communicate on the field communication J3 channel must be programmed into SW8 By placing SW8 5 in the closed position 1 stop bit is selected By placing SW8 5 in the opened position 2 stop bits are selected Figure 2 8 shows this switch in the closed position since only 1 stop bit is typically used on GENISYS code lines installed by US amp S The sele
42. etermines the maximum number of control and recall requests that may be buffered by the PRCCI at any one time Normally the office is capable of generating such requests at a faster rate than which the PRCCI is able to transmit them to the the field This parameter must be set between 1 and 8 4 3 3 3 Maximum Station Address This parameter determines the highest station address polled by the PRCCI The PRCCI also uses this parameter to verify the station address in control and recall requests from the office The GENISYS PRCCI application restricts the highest station address to 127 4 3 3 4 Number Of Station Retries Per Set This parameter determines the number of single retries in a retry set Primarily it dictates the number of times that the PRCCI may retry a transmission before declaring an error monitor condition for a field 6408F p 4 4 code unit This parameter must be set between 1 and 5 4 3 3 5 Number Of Station Retry Sets This parameter determines the number of retry sets that the PRCCI must exhaust before declaring a failure condition for a field code unit It must be set between 1 and 5 4 3 3 6 Maximum Control Byte Number This parameter determines the highest control byte number that may be specified in a control request from the office The GENISYS PRCCI application restricts each field code unit to a maximum of 32 control bytes and assumes that those bytes are addressed as 0 through 31 The GENISYS EO control byte
43. h transmission reported the message type is displayed followed by any applicable station address and control or indication data Station addresses and data are always displayed in the currently selected format 6 4 4 2 HISTORY OFFICE Syntax HISTORY OFFICE The HISTORY command entered with the OFFICE option generates a historical report of the most recent messages exchanged between the office computer system and the PRCCI Direction and contents are reported for each historical message Direction is indicated by the symbols XMT and RCV XMT denotes a PRCCI transmission to the office while RCV denotes reception from the office The message contents are always displayed in hexadecimal 6 4 4 3 HISTORY TIME Syntax HISTORY TIME The HISTORY command entered with the TIME option performs no function in this PRCCI application 6408F p 6 5 6 4 5 LOGIN Syntax LOGIN prcci address The LOGIN command is used to gain the attention of a specific PRCCI to open a maintenance session The PRCCI address must be specified as a decimal value between 1 and 255 No prompt is generated for this command Upon receipt of a proper LOGIN command the PRCCI prompts the user for a password The password is not echoed and if it is entered incorrectly the login sequence is aborted without any warning or error messages If a LOGIN command is entered during an open maintenance session the open session is automatically closed This is to prevent multiple maint
44. hardware checks verify the line integrity character framing and that no data overrun has occured loss of data The protocol level checks progressively verify any CRC 16 the message header unit address and any data portion of each message 6408F p 5 2 5 3 1 Poll The poll message is generated to allow a GENISYS to return any new or changed indication information This message has both a secure and non secure format The secure format contains a CRC 16 while the non secure does not The format used is determined by the secure poll flag in the EO control byte Either an indication or acknowledge is a valid response to this message 5 3 2 Acknowledge And Poll The acknowledge and poll message is generated to acknowledge an indication from a GENISYS and to poll for any additional information All indication messages from a GENISYS must be acknowledged by the PRCCI Until acknowledged the unit assumes the PRCCI failed to receive the last response and will re transmit it in subseguent conversations As with a poll message either an indication or acknowledge is a valid response to this message 5 3 3 Indication Recall The indication recall message is generated to request all current indications from a GENISYS The GENISYS is only permitted to respond with an indication message 5 3 4 Control Request The control request message is generated to request that a GENISYS deliver the specified control data The PRCCI is only
45. he possible responses are given for messages generated by an office These are listed in order from the highest priority to the lowest Each message must pass a variety of hardware and protocol level checks before it may be processed The lower level hardware checks verify the line integrity character framing and that no data overrun has occured loss of data A series of protocol checks progressively verify any CRC 16 the message header unit address and any auxiliary header Each message is then subject to specific edit checks to verify that the contents meet the requirements of the application and the installation 4 3 1 Poll The poil message is generated to allow the PRCCI to return any new or changed information from its database This message has both a secure and non secure format The secure format contains a CRC 16 while the non secure does not The format used is determined by the SENSEC flag in Status Control Register 1 Valid responses from the PRCCI include SIR data Indication Local indication Acknowledge ACK Aa Uy NO h 4 3 2 Acknowledge And Poll The acknowledge and poll message is generated to acknowledge data from the PRCCI and to poll for any additional information All messages from the PRCCI that contain data must be acknowledged by the office Until acknowledged the PRCCI assumes the office failed to receive the last 6408F p 4 3 response and will re transmit it in subsequent conversations In sub
46. he switch assignments and their options A typical repeater characteristically delays and shortens the carrier key on signal RTS by some pre determined time This time is typically measured in bit times and is specific to the type of repeater used Consult documentation on the specific repeater s in use for the delay times imposed If that information is not available allow a nominal 3 bit time delay for an amplifier repeater and a nominal 7 bit time delay for a regenerative repeater 2 2 4 Office Transmit Key off Delay Selection The key off delay time used in communication with the office must be programmed into SW8 The delay time selected is used in the transmission of responses to the office on the both the normal J1 and standby maintenance J2 channels This parameter measured in bit times determines the time between the end of data transmission and the de assertion of request to send RTS A nominal 4 bit times is recommended to ensure that all data bits have transmitted on the carrier circuit and to help prevent transients that could reduce data integrity The key off delay may have to be lengthened to compensate for any 6408F p 2 2 additional delays imposed by modems repeaters leased circuits or microwave equipment Figures 2 3 and 2 5 list the switch assignments and their options A repeater particularly a regenerative as opposed to an amplifier may tend to buffer and delay the transmission of data Consult d
47. ice is not permitted to alter this parameter 6408F p 4 11 SECTION V FIELD INFORMATION EXCHANGE 5 1 OVERVIEW The PRCCI communicates with one or more GENISYS field code units over a half duplex code line The PRCCI is the master on this circuit and initiates all conversations Only the addressed field unit is permitted to respond If the unit detects an error in decoding a transmission the error is implied by the lack of a response The PRCCI attempts a limited number of retries on messages when no response is seen or an error is detected in the response 5 2 PHILOSOPHY AND SECURITY The protocol uses modified binary characters to frame messages that are designed to lend themselves to hexadecimal interpretation Characters in the range of SF0 through SFE are reserved as unique control characters The character SFF is illegal since it is commonly created on noisy data channels Data security is provided in the form of a CRC 16 checksum The generator polynomial is the standard CRC 16 polynomial x18 x 4 x2 1 Characters in the range of 00 to SEF are sent as is in a single byte A character in the range of F0 through FF is sent as a seguence of two bytes This seguence consists of the data escape character F0 followed by the low order nibble right hex digit of the original character The receiver of any message containing this sequence must always logically OR the two characters and treat the result as a single charac
48. igure 2 13 to convert a single bit time to milliseconds at the selected baud rate Factors to be considered in the no response timeout calculation include 1 The baud rate of the circuit This time is typically represented in units of bits per second and should be converted to milliseconds for this calculation Calculate the time for 2 characters at the given baud rate Assume 10 bits per character unless 2 stop bits or parity has been enabled in which case use 11 bits per character 2 Maximum Field key on delay This delay is typically represented in units of bit times and should be converted to milliseconds for this calculation Properly selected key on delays in the field should already take carrier delays such as repeaters into consideration 3 Carrier modulation demodulation delay The signal modulation and demodulation circuits internal to medium speed 300 to 1200 BPS FSK modems and repeaters typically impose a delay on data throughput This delay is typically measured in bit times and is specific to the type of equipment used Consult documentation on the particular type of equipment in use If information is not available allow a nominal 4 bit time delay for each time that the carrier signal must be re modulated and demodulated 4 Carrier propogation delay On open line vwire a carrier signal propagates at approximately 179 000 miles second or about 0 56 milliseconds for every 100 miles In 19 cable a carrier signal propagat
49. inated with the control C interrupt The selection of NOAUTOMATIC inhibits the PRCCI from automatically activating the field monitor regardless of any message traces selected 6 4 7 2 MONITOR FIELD Syntax MONITOR FIELD The MONITOR command entered with the FIELD option specifies that field message traffic is to be monitored on the maintenance terminal The types of messages to be monitored and any station address trace filter must be previously specified with the SET TRACE command For each transmission reported the message type is displayed followed by any applicable station address and control or indication data Station addresses and data are always displayed in the currently selected format 6 4 7 3 MONITOR OFFICE Syntax MONITOR OFFICE The MONITOR command entered with the OFFICE option specifies that office message traffic is to be monitored on the maintenance terminal Only messages addressed to the PRCCI are monitored Direction and contents are reported for each monitored message Direction is indicated by the symbols XMT and RCV XMT denotes a PRCCI transmission to the office while RCV denctes reception from the office The message contents are always displayed in hexadecimal 6408F p 6 7 6 4 8 RECALL Syntax RECALL option ALL control address The RECALL command allows the user to manually request a recall to be transmitted for a specific station The GENISYS code system does not provide a master recall capabi
50. it to the idle MARK state and serve to frame the transmitted character to ensure that the next start bit may be recognized as a MARK to SPACE transition Figure 2 17 depicts the asynchronous character format utilized on the circuit 2 6 LOCAL CONTROLS AND INDICATIONS All of the line local outputs and inputs are available to the office as local controls and indications The use of these is dictated by installation requirements and should be reflected in site specific plans Detailed information and specifications of the line local interface are available in the Hardware Description and Installation service manual 6408F p 2 16 p 8 DATA BITS PARITY MARK V to qaa ua uka ee a ee upya ug IDLE LSB MSB LE Jo wo A A A 4 SPACE V dub un ob udo db Lue dc E Eb ad kose START STOP START BIT BIT S BIT NOTE PARITY BIT IS GENERATED ONLY IF PARITY IS ENABLED TIME gt Figure 2 17 Asynchronous Character Format Field 6408F p 2 17 J3 FIELD COMM NOTES 1 ONLY TXD RXD AND SIGNAL GROUND ARE REQUIRED FOR MINIMAL INTERFACE OTHER INPUT SIGNALS ARE INTERNALLY ASSERTED WHEN NOT WIRED 2 RTS IS NECESSARY ONLY IF PRCCI IS REQUIRED TO KEY CARRIER ON TO TRANSMIT Figure 2 18 Typical EIA level Carrier Interface 6408F p 2 18 PRCCI CARRIER TXD 12 SS 4 13 gt gt ee gt gt n S gt P y p n gt D S LM CS NO CONNECTION
51. l transmission and any checkback and execute sequence supported by the GENISYS code system RECALL NN This message indicates that the PRCCI is recalling indications from station address NN KEY MARK This message indicates that the PRCCI is in line maintenance mode transmitting a rest state of MARK to the code line communication eguipment This capability is only provided through the maintenance session KEY SPACE This message indicates that the PRCCI is in line maintenance mode transmitting an inverted rest state norest of SPACE to the code line communication equipment This capability is only provided through the maintenance session KEY DUTY CYCLE This message indicates that the PRCCI is in line maintenance mode transmitting a 50 duty cycle to the code line communication equipment This capability is only provided through the maintenance session CODE LINE NORMAL This message indicates that line maintenance mode has just been turned off and that normal code line operation has not yet resumed There is typically a short delay in returning to normal operation that varies with the code line baud rate This message will remain on the front panel if the PRCCI is not initialized 6408F p 3 3 3 6 ERROR MESSAGES This error flag may appear on the front panel immediately to the cight of the station address It indicates that an error condition has been declared for the station due to a hardware level error detecte
52. l requests to transmit the PRCCI independently polls the field code units in a round robin fashion This is indicated by only a station address displayed on the front panel 3 2 FUNCTION LED DESCRIPTIONS Seven of the eight LEDs in this group are software controlled status indicators for various functions under software control of the PRCCI The remaining LED is a hardware driven power indicator A brief description of each LED and its associated function is given below FUNCTION XMT This LED denotes a FIELD TRANSMIT function When illuminated it indicates that the PRCCI is transmitting data to the field communication eguipment FUNCTION REC This LED denotes a FIELD RECEIVE function When illuminated it indicates that the PRCCI is receiving data from the field communication eguipment 6408F p 3 1 FUNCTION GM This LED denotes a GOOD MESSAGE function It reflects message traffic between the cpu boards A flash rate of once per second indicates normal internal polling of CPU B by CPU A A faster rate indicates message traffic between the PRCCI and the office FUNCTION ERR This LED denotes a HOST ERROR function When illuminated it indicates that an error has been detected in communication with the office It remains illuminated until communication is re established with the office FUNCTION A This LED denotes an ADDRESS ACCEPT function When illuminated it indicates that the PRCCI is being addressed by the office F
53. lications not all registers ara used by all of the applications This section describes each register implemented by the GENISYS PRCCI application Those not described are accessible but perform no function 4 5 1 Status Control Register 0 SNOIDB E SCTBSY SINQOV SDETER SLNERR Figure 3 3 SCR 0 Flags SNOIDB Clear the no indication database flag SCTBSY Clear control queue busy flag Forces the PRCCI to clear its control request queue SINQOV Clear indication queue overflow flag The indication queue is not cleared of data SDETER Clear PRCCI detected error flag 4 5 2 Status Indication Register 0 SNOIDB SMAINT SCTERR SCTBSY SINQOV SDETER SLNERR SRCINI Figure 3 4 SIR 0 Flags SNOIDB No indication database This flag is cleared by the office to Signify that indications from all stations on the code line have been received The PRCCI normally sets this flag upon reset or initialization SMAINT Maintenance session open This flag is set to indicate that a maintenance session is opened SCTERR Control request error This flag is set to indicate that an error was detected while performing edit checks on a previous control request from the office It remains set until the office generates an acceptable control request SCTBSY Control queue busy This flag is set to indicate that the maximum number of control requests have been queued by the office The flag is cleared automatically once the control
54. lity and therefore the ALL option performs no function in this PRCCI application 6 4 9 RESET Syntax RESET The RESET command typically causes a master reset function to be applied to the code line The GENISYS code system does not support this capability and therefore this command performs no function in this PRCCI application 6408F p 6 8 6 4 10 SET syntax SET option argl arg2 NO CRT FORMAT format code BINARY DECIMAL HEXADECIMAL LINE state CYCLE NORMAL NO REST SCR scr number mask SIR sir number mask NOTRACE arg1 CONTROL INDICATION TIME TRACE argl arg2 CONTROL control address INDICATION indication address TIME indication address TRIGGER station number The SET command allows the user to customize the maintenance session environment as well as review or modify various parameters and operating characteristics 6 4 10 1 SET CRT Syntax SET CRT SET NOCRT The SET command entered with either the CRT or NOCRT option selects whether the PRCCI treats the maintenance terminal as an ANSI standard CRT or a hardcopy terminal This affects the display of the current line when a character is deleted The selection of CRT mode allows the delete RUBOUT or backspace key to erase a character from the terminal screen by echoing the sequence of backspace space backspace The NOCRT mode causes the delete sequence to echo backslash deleted character s backslash 6408F p 6 9 6 4 10 2 SE
55. ll such registers zefined by the GENISYS PRCCI application Valid responses from the PRCCI include 1 SIR data 2 Acknowledge ACK 4 3 6 Indication Database Request The indication database request message is generated by the office to update its own indication database This function provides the capability for the office to update itself without having to place recall and unchanged indication traffic on the field code line Indication data generated in response to this request appears to the office as normal indication messages Valid responses from the PRCCI include SIR data Indication Local indication Acknowledge ACK UC MN IP 4 3 7 Local Control Request The local control request message is generated to request that the PRCCI deliver local controls If control checkback is enabled the only legal response is a local control checkback message When checkback is disabled valid responses from the PRCCI include SIR data Indication Local indication Acknowledge ACK WN c 4 3 8 Execute Local Control The execute local control message is generated to execute a local control request that had been previously verified with a local control checkback message from the PRCCI This message must immediately follow the local control checkback or the office must repeat the sequence beginning with a retry of the local control request This message is illegal if control checkback is disabled Valid responses from the PRCC
56. m does not provide this capability and therefore this command performs no function in this PRCCI application 6 5 ERROR MESSAGES The maintenance session reports error conditions to the user in textual messages An error message is a brief explanation of the condition which was detected Messages that point out specific mistakes made by the user typically begin with the prefix ERROR In general they 6408F p 6 15 refer to command line errors such as imprcper syntax or use of numeric formats Other messages are intended to inform the user of conditions that may prevent the successful ccmpletion of a command Each error message is described below along with a brief explanation of the typical causes ERROR Ambiguous command or option A key word representing a command name or command option was abbreviated to short The command line could not be successfully interpreted because one or more key words could not be uniquely identified within the context of the command Supply more letters in the abbreviated key word s ERROR Illegal argument A command line argument was not entered correctly and the associated ccmmand could not be processec For example a numeric field may exc ed a particular range or no ntered in the currently selected for Verify proper use of f mats and that the value of the field 9 not exceed a limit tha may imposed by the particular command ERROR Request rejected A code line request made by
57. me fields such as a station address Control and indication information is displayed such that it corresponds left to right with a typical code and function assignment sheet The decimal format allows code line information to be represented with the digits 0 through 9 When entering fields leading zeroes are typically permitted but ignored The hexadecimal format allows code line information to be represented with the digits O through 9 and A through F In the specification and display of station addresses leading zeroes are always significant Some application independent commands use four hexdecimal digits to represent a station address Within these fields address information is left justified and interpreted left to right Fields entered with fewer than four digits are padded on the right with zeroes The binary and native formats allow code line information to be represented with the digits l and 0 or two other appropriate characters In the specification and display of station addresses leading zeroes or equivalent are always significant Some application independent commands use sixteen digits to represent a station address Within these fields address information is left justified and interpreted left to right Fields entered with fewer than sixteen digits are padded on the right with zeroes or eguivalent 6 3 OPENING A MAINTENANCE SESSION A proper login and password sequence is necessary to open a maintenance sessi
58. o the recall are always returned to the office regardless of whether or not there is a change in State Valid responses from the PRCCI include SIR data Indication Local indication Acknowledge ACK x LI N S 4 4 PRCCI GENERATED MESSAGES 4 4 1 Local Control Checkback The local control checkback message is generated as part of the verification procedure for local control delivery It is only legal in response to a local control request from the office when checkback is enabled A proper checkback response returns the same control byte number and control byte data as reguested 6408F p 4 7 4 4 2 Control Checkback The control checkback message is generated as part of the verification procedure for control transmission to the field It is only legal in response to a control request from the office when checkback is enabled A proper checkback response returns the same field code unit address and control information as requested 4 4 3 Status Indication Register Data The SIR data message is generated to return SIR information to the office SIR information is returned only when changes occur or upon request from the office 4 4 4 Indication The indication message is generated to return field indication data to the office Normally indications are returned only when a change in state ig detected or when the office has requested a recall This message may contain multiple indication records where each record is associated
59. ocumentation on the specific repeater s in use for the delay that it may impose If that information is not available allow a nominal 7 bit time delay for a regenerative repeater Allow a nominal 4 bit times for carrier modulation demodulation delay in an amplifier repeater OPEN 1 CLOSE 0 128 64 32 16 8 4 2 1 lt BINARY WEIGHT IN DECIMAL Figure 2 1 Binary Weights For Switch Positions SW7 PRCCI 8 7 6 5 4 3 2 1 ADDRESS ILLEGAL ooo onnananna ooo anananana ooo aanananaaa ooo ANAAAAAAA ooo ODnNnnannnna ooo OOooooonoooona ooo 000000000 ono aocnononoan Figure 2 2 PRCCI Address Examples 6408F p 2 3 8 7 6 5 4 3 2 OPEN 1 CLOSE 0 7 Less BAUD RATE OFFICE TRANSMIT KEY OFF DELAY OFFICE TRANSMIT KEY ON DELAY Figure 2 3 SW8 Switch Assignments CPU A SW8 OFFICE OFFICE 4 3 2 1 BAUD RATE 2 l BAUD RATE w 990090000 200000 00Q 20000000 2090900000 Q OOGOOOOGO onononod C C C C C C C C Figure 2 4 Office Baud Rate Options 6408F p 2 4 SW8 OFFICE TRANSMIT SW8 OFFICE TRANSMIT E KEY ON DELAY 6 5 KEY OFF DELAY 4 BIT TIMES 4 BIT TIMES 8 16 16 32 32 Figure 2 5 Office Transmit Key on off Delay Options 2 3 CPU B CONFIGURATION The GENISYS application of the PRCCI requires EPROM set number N451800 0105 installed in CPU B This is a special purpose set unique to this application that enables the PRCCI to communicate with a GENISYS code sys
60. on on any PRCCI The LOGIN command must be spelled correctly and specify in decimal the address of the PRCCI For compatibility with the office protocol a PRCCI does not generate any responses or echo characters until a LOGIN command has been accepted For this reason no prompt is ever generated for a LOGIN command Upon receipt of a proper LOGIN command the PRCCI prompts the user for a password The password is not echoed and if it is entered incorrectly the login sequence is aborted without any warning or error messages Once a maintenance session is opened a brief welcome message and a command line prompt are displayed Any legal maintenance command may now be entered A HELP command is available that displays a summary of maintenance commands and their options The HELP command accepts as an option a command name and provides detailed information on the command s syntax or format A maintenance session is normally closed with a LOGOUT command and a brief termination message is displayed A valid office protocol message may override an open session This forces the session closed immediately and no termination message is displayed 6408F p 6 2 In the example below a maintenance session is opened on a PRCCI with an assigned address of two Underscored text is entered by the user LOGIN 2 Password Maintenance session opened on PRCCI 2 PRCCI gt HELP CLEAR option argl ERRORS HISTORY PRCCI gt HELP CLEAR
61. or equipment or a failure of the field unit CONTROL ERR This message indicates that an improperly formatted control request has been received from the office Normally this reflects a possible problem in the office and should never occur with an in service installation RECALL ERR This message indicates that an improperly formatted recall request has been received from the office Normally this reflects a possible problem in the office and should never occur with an in service installation 6408F P 3 4 ADDRESS ERR This message indicates that an illegal station address was specified in either an control or recall request from the office The requested station address is not permitted to be zero or to exceed the highest address polled This may reflect a possible problem in the office and should never occur with an in service installation INVALID INIT MSG An incorrect initialization message was received from the office The message passed communication hardware checks and protocol level checks but the contents of the message do not meet the requirements of the GENISYS application Once the PRCCI receives an invalid initialization message it ceases normal code line operation and requests initialization from the office This may reflect a possible problem in the office or that the PRCCI is not connected to the office through the correct communication channel This error should never occur with an in service installation
62. ponse to a control request from the PRCCI when checkback is enabled A proper checkback response returns the byte number and data for each control byte requested 5 4 2 Indication The indication messsage is generated to return indication data to the PRCCI Indications are normally returned only when a change in state is detected or in response to a recall from the PRCCI Excluding the 0 indication byte an indication message may not contain an indication byte number at exceeds the maximum specified by the office at initializatic 5 4 3 Acknowledge The acknowledge message is generated as a response when a GENISYS has no data to return to the PRCCI This message has only a non secure format that does not contain a CRC 16 5 5 POLLING CYCLE DESCRIPTION The PRCCI polls a pre determined number of stations in a round robin fashion To minimize delays in the polling cycle due to errors or no response timeouts failed stations are not polled At the end of each polling cycle a recall is transmitted for a failed station in an attempt to eventually establish communication with all possible stations Office requests for controls zecalls take priority and may interrupt the normal polling cycle Wh Ll office requests are satisfied the polling resumes from the point which it was interrupted Any time that either a hardware or protocol level error is detected for a live station the PRCCI skips to the next live station in the polling cycle
63. processed internally by the PRCCI is not subject to this restriction 4 3 3 7 Maximum Indication Byte Number This parameter determines the highest indication byte number that may be received from a field code unit and as well as returned to the office The GENISYS PRCCI application restricts each field code unit to a maximum of 32 indication bytes and assumes that those byte are addressed as O through 31 Regardless of the selection for this parameter the GENISYS EO indication byte is accepted in a field indication message and is also passed in an office indication message 4 3 3 8 E0 Control Byte Mask This parameter instructs the PRCCI how to configure the EO control byte of each field code unit The use of the EO byte is explained in more detail section 5 6 4 3 4 Set Status Control Register The set status control register SCR message is a secondary mechanism used by the office to initialize dynamically alter or otherwise maintain certain operating characteristics The characteristics determined by the status control registers may be altered without re initialization of the PRCCI Section 4 5 describes the registers and the characteristics that they control Valid responses from the PRCCI include SIR data Indication Local indication Acknowledge ACK C3 N ha 6408F p 4 5 4 3 5 Status Indication Register Request The status indication register SIR request message is generated to examine the current contents of a
64. processor architecture These microprocessors reside on separate but identical printed circuit boards CPU A and CPU B The two processor boards communicate with each other over an internal asynchronous serial data channel CPU A is the master on this circuit and CPU B is permitted to respond only when addressed CPU A is primarily responsible for communication with the office This includes the implementation of the office protocol on both the normal Jl and standby J2 channels as well as the interactive 6409F p 1 1 maintenance session CPU B is primarily responsible for code line communication and ntrol of the front panel display A ribbon cable connects CPU B with te interface board The interface board physically provides the processor access to the line local inputs and outputs as well as the discrete LEDs and alphanumeric display on the front panel This configuration allows for optimum utilization of each processor while minimizing inter processor communication 1 4 FLOW OF INFORMATION Information from an office is first received by CPU A and subjected to lower level hardware and protocol level verification CPU A informs CPU B that information has been received and determines if the message is addressed to the unit and requires further processing Certain classes of messages are processed directly by CPU A The responses to these messages are determined by CPU A Most classes of messages however require that CPU A pass the
65. received message to CPU B for additional verification and subsequent processing In general for these messages the response of CPU B determines the response of CPU A to the office CPU B may typically respond to CPU A with any buffered information that it has at the time This excludes certain maintenance session messages that require specific responses and cases where messages fail verification by CPU B Regardless of the level of activity in office communication CPU A regularly polls CPU B for information This allows to unit to detect internal failures and to a certain extent function independently of office communication 6408F p 1 2 SECTION II INSTALLATION 2 1 APPLICATION FIRMWARE All PRCCI applications require specific Erasable Programmable Read Only Memory EPROM sets to be installed in each CPU board Each set is assigned a part number and is ordered separately from the PRCCI unit itself Each EPROM within a set is identified by an individual part number for manufacturing and distribution purposes A label on each EPROM specifies individual EPROM part number revision level IC socket and CPU board A or B assignments When installing or removing an EPROM keep the device aligned squarely with the socket to prevent bending and breaking the pins Do not install an EPROM with bent broken or severely fatigued pins They could break off within the socket possibly requiring removal and replacement of the socket The notche
66. s in the socket and EPROM must be aligned to avoid damage to the device when power is applied Random Access Memory RAM IC devices are necessary for operation of each cpu board The exact number required varies with each EPROM set and may change from one revision to the next As a general rule any of the IC sockets IC10 ICll IC12 IC13 IC14 and IC15 that are not used for the EPROM set should contain RAM devices IC socket IC9 must always contain a RAM device while IC socket IC16 must always contain the designated EPROM from the set 2 2 CPU A CONFIGURATION The GENISYS application of the PRCCI requires EPROM set number N451800 0114 installed in CPU A This is a general purpose set also used in other PRCCI applications It primarily supports communication with the office computer system and provides the maintenance session capability Unless dictated by the installation all jumpers on the board should be placed in the standard positions Switches SWl SW2 SW3 SW4 SW5 and SW6 must be placed in the EPROM position Refer to the Hardware Description and Installation service manual for information on the standard positions of these items Any variations from the standard positions should be reflected in site specific plans 6408F p 2 1 DIP switch packs SW7 and SW8 are used to select various parameters that affect communication with the office computer system Programming of these switches is dictated by the installation and should
67. sequent conversations a higher priority response may take precedence but no loss of data occurs 4 3 3 PRCCI Initialization The PRCCI initialization message i3 the primary mechanism used by the office to configure a PRCCI to a specific installation The capabilities of a PRCCI are limited until the unit is initialized by the office This message supplies the unit with parameters to be used in communication with both the office and field These parameters are described in the following sections Valid responses from the PRCCI include 1 SIR data 2 Acknowledge ACK 4 3 3 1 Maximum Indication Records Per Message This parameter determines the maximum number of buffered indication records that may be returned to the office in a single indication message A record represents a single indication message from a field code unit Adjustment of this parameter not only affects operation of the PRCCI but may also affect the perceived performance of the office This parameter must be set between 1 and 8 In general the slower the effective rate at which the PRCCI is polled the higher this parameter should be A single unit connected directly to the office through a dedicated channel may have this parameter set relatively low 1 or 2 Multiple units that share a communication channel to the office should have this parameter set higher to compensate for the effectively slower polling rate 4 3 3 2 Maximum Control Queue Entries This parameter d
68. t detects an error in decoding a message the error is implied by the lack of a response The office attempts a limited number of retries on messages when no response is seen or an error is detected in the response 4 2 PHILOSOPHY AND SECURITY The protocol uses modified binary characters to frame messages that are designed to lend themselves to hexadecimal interpretation Characters in the range of F0 through FE are reserved as unique control characters The character SFF is illegal since it is commonly created on noisy data channels Data security is provided in the form of a CRC 16 checksum The generator polynomial is the standard CRC 16 olynomial pi x16 xi x 1 Characters in the range of 00 to SEF are sent as is in a single byte A character in the range of SFO through SFF is sent as a sequence of two bytes This sequence consists of the data escape character F0 followed by the low order nibble right hex digit of the original character The receiver of any message containing this sequence must always logically OR the two characters and treat the result as a single character Every message starts with a function specific header character in the range of F1 through F5 or F7 through FE followed by a unit address Any data if applicable to the function then follows The data portion is function specific and may vary in length Following the data is the CRC 16 then a SF6 terminator character End of Text or ETX The CR
69. tem Unless dictated by the installation all jumpers on the board should be placed in the standard positions Switches SWl SW2 SW3 SW4 SW5 and SW6 must be placed in the EPROM position Refer to the Hardware Description and Installation service manual for information on the standard positions of these items Any variations from the standard positions should be reflected in site specific plans DIP switch packs SW7 SW8 and SW9 are used to select various parameters associated with field communication The PRCCI must be reset to affect any switch changes 2 3 1 Code System Type The code system type must be programmed into SW7 It must be programmed as shown in Figure 2 6 for PRCCI to function in a GENISYS application 2 3 2 No Response Timeout Selection The no response timeout must be programmed into SMI This parameter measured in milliseconds determines the length of time that the PRCCI waits for a response to each message that it transmits For proper operation the time selected must be equal to or greater than the time required to transmit the ETX F6 and receive the message header Fl F2 or F3 from a field response The options available are listed in figure 2 7 6408F p 2 5 To calculate this time consider the possibla delay factors listed below and determine the time associated with each Select a DIP switch option that exceeds the total time of all delay factors For factors measured in bit times refer to f
70. ter Every message starts with a function specific header character in the range of Fl through F3 or SFA through FE followed by a unit address Any data if applicable to the function then follows The data portion is function specific and may vary in length Following the data is the CRC 16 then a F6 terminator character End of Text or ETX The CRC 16 is generated from the header address and data portion prior to any possible data escape sequences being introduced Only the message header and terminator characters are excluded from any possible data escape sequence 6408F p 5 1 In general messages are classified according to function with a unique header character for each class Figure 5 1 summarizes the message headers used by the PRCCI in transmissions to GENISYS field code units Figure 5 2 summarizes transmissions F HEADER MESSAGE FUNCTION TOS usen NE ACKNOWLEDGE AND POLL xa CONTROL REQUEST INDICATION RECALL EXECUTE CONTROL Figure 5 1 PRCCI Generated Messages CONE m emmms m meum DOME those used by GENISYS units to respond to PRCCI igure 5 2 GENISYS Generated Messages 5 3 PRCCI GENERATED MESSAGES This section disc it may be proc usses the function and implementation of messages exchanged between a GENISYS PRCCI and a GENISYS field code unit Each message must pass a variety of hardware and protocol level checks before essed The lower level
71. vides a suitable interface but is not necessarily compatible with most communication test equipment Figure 2 19 shows a typical TTL level interface between a GENISYS PRCCI and carrier equipment Additional interfacing information is provided in the Hardware Description and Installation service manual The word format utilized on this channel is DIP switch selectable with 1 start bit 8 data bits an optional parity bit and an option for 1 or 2 stop bits The baud rate is also DIP switch selectable Both the normal and alternate rates are determined by the switch selection The transmission of a character requires that the circuit transition from an idle MARK state to the SPACE state for one bit time This first transition is called the start bit During the next eight bit times the circuit transitions between MARK and SPACE as required to represent the character The least significant bit of the character is transmitted first If enabled the parity bit is transmitted next Parity is an error detection mechanism where either an even or odd number of MARK bits are required within a character The state of the parity bit is determined by the type of parity selected and the number of preceding data bits transmitted as a MARK For even parity the parity bit is manipulated to result in an even number of MARK bits Odd parity results in an odd number of MARK bits to occur A character is terminated with one or more stop bits Stop bits force the circu
72. with a particular field code unit The PRCCI initialization message specifies the maximum number of records that may appear in a message An indication record specifies the field code unit address the number of indication bytes in the record as well as each indication byte number and current indication byte data The indication message is also used to report field code unit status information to the office Such information includes monitor and failure conditions that may be declared or automatically cleared up by the PRCCI 4 4 5 Local Indication The local indication nesssage is generated to return local indication data to the office Local indications are returned only when a change in state is detected or in response to a recall from the office 4 4 6 Acknowledge The acknowledge message is generated as a response when the PRCCI has no data to return to the office This message has only a non secure format that does not contain a CRC 16 4 5 STATUS CONTROL AND INDICATION REGISTERS Certain operating characteristics are controlled and indicated through internal status registers These registers are accessible by the office computer system and allow the office to dynamically maintain the characteristics as well as sense and or clear possible error conditions detected by the PRCCI 6408F p 4 8 There are sixteen registers available addressed 0 through 15 While the function of each register is consistent across all PRCCI app
73. with the SET TRACE command No help for that command The HELP command could not identify the command name entered as an option Enter the HELP command by itself to check the spelling of the command name or refer to this manual No trace selected An attempt was made to activate the field monitor function but no field message types have been selected with the SET TRACE command Use the SET TRACE command to select the message types to be monitored Output buffer overflow Data lost The amount of information sent to the maintenance terminal exceeded the capacity Of the internal buffer The oldest information in the buffer was purged and any pending XOFF hold screen canceled This typically occurs if the hold screen feature is used to freeze the display for a prolonged period of time 6408F p 6 17 SECTION VII SUPPLEMENTAL INFORMATION 7 1 CONVENTIONS This section contains reference information on message formats for those messages exchanged by the GENISYS PRCCI with both the office and GENISYS field code units Certain messages may contain multiple blocks of similar data These blocks may be repeated a limited number of times within the message Such blocks are denoted by square brackets in the description column Where repeatable blocks may occur within blocks this is denoted with multiple square brackets The range of each field in a message is given in hexadecimal A single hexadecimal number two digits indicates

SERVICE MANUAL 6408F US&S GENISYS APPLICATION

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SERVICE MANUAL 6408F US&amp;S GENISYS APPLICATION

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SERVICE MANUAL 6408F US&S GENISYS APPLICATION