MM1 Modem Manager Smart Modem Buffer User Manual V.1.7
Contents
1. M odems are designed to operate with computers and require several control lines to function properly Because these control lines are not available on an RS485 bus modems are less suitable for and more difficult to use in remote applications MODEM MANAGER 1 Typical phone lines are voice grade and the quality of the connection can vary from location to location M odems are designed to communicate with each other by negotiating a baud rate that provides the most reliable data transfers This can range from 300 to 57 6 baud However the baud rate of an RS485 bus is fixed thus limiting the modems to communicating at this fixed rate If this rate cannot be negotiated the connection cannot be established Another problem is line dropouts Even if the communication rate is established noise can cause intermittent line dropouts Since there are no control lines on an RS485 bus there is no way to stop the flow of data to the modem In many cases the modem buffer fills and overruns causing loss of data communication errors and in many cases loss of the actual connection There is also the issue of determining how the remote modem will answer and after how many rings Electro Industries GaugeTech 1 The above all lead to the fact that special programming of the modem is required T he user must fix the baud rate to that of the RS485 bus set auto answer and set the number of rings to answer on among other things This is2. Ports and Connectors RS232 DB9 female RS485 2 or 4 wire detachable terminal block Enclosure Rugged aluminum resistant to electromagnetic interference Dimensions Length 67 168 3mm Width 2 72 0mm H eight 1 25 4mm Mounting Stand alone or wall mount mounting plate supplied Operating Temperature 20 to 70 C 20 Electro Industries GaugeTech Appendix 5 Bracket Installation Electro Industries GaugeTech 21 Appendix 6 M ounting Information Height 1 Electro Industries GaugeTech
3. the number of rings 1 9 the M odem M anager is to wait before having the modem answer Modem String Program M odem String is used to enter a modem initialization string Use Read M odem String to verify the current setting and Remove M odem String to erase the modem initialization command MH Program M odem String e Type C 1string Enter where string is the modem string of up to 254 characters e When properly executed CO lt CR gt will be sent back See the Command Summary in the Appendix for details m Read M odem String e Type C2 Enter If no modem string has been programmed the result will be C1 lt CR gt Otherwise C2 string lt CR gt will be returned where string is the modem string See the Command Summaryin the Appendix for details Electro Industries GaugeTech 7 m Remove M odem String e Type CO Enter e CO lt CR gt will be returned indicating that the string has been erased See the Command Summary in the Appendix for details Modem Manager Unit ID You can specify a unit ID of up to thirty alphanumeric characters for each M odem M anager This unit ID can be programmed read or erased M Program Unit 1D e Type 111D Enter where ID is the user defined unit ID 10 lt CR gt will be returned confirming that the user defined unit ID has been programmed See the Command Summary in the Appendix for details mM Read UnitID e Type I2 Enter e 121ID lt CR gt will be returned where I
4. D is the user defined unit 1D See the Command Summary in the Appendix for details E Remove Unit ID e Type IO Enter e 10 lt CR gt will be returned confirming that the user defined unit ID has been erased See the Command Summary in the Appendix for details Return to Normal Mode To go to Normal M ode M Type N Enter H N lt CR gt will be returned indicating that the M odem M anager is now in Normal mode 8 Electro Industries GaugeTech Echo The echo command can be used to query the M odem M anager to find out if it is responding correctly m Type A Enter m A lt CR gt will be returned if the M odem M anager is responding correctly See the Command Summary in the Appendix for details Modem Manager Status m Type B Enter mM Babc lt CR gt will be returned where ais the position of the RS232 BAUD switch 0 fixed baud rate 600 1200 2400 4800 9600 19 2K 38 4K or 57 6K 1 MODEM 2 PROGRAM e bis the mode the M odem M anager is in 0 Program mode 1 Command mode cis the operating software s check sum status Product Code This command returns the product code assigned to M odem M anager 1 m Type E Enter m Product code lt CR gt will be returned where product code is M odem M anager 1 s product code M odem M anager 1 Electro Industries GaugeTech Resetting the Modem Manager The M odem M anager will automatically reset after five to ten minutes if it has no
5. F485DB RS485 Communications Port Model SF485DB RS485 Bus Connections Details Two Wire Half Duplex 00000 Li bere rs Modem Manager 1 r Modem Enlarged View of Twisted Pair Segments Twisted Pair Segment Ea ue ups ao1Aep 390 wepow 3 l 00SZ WOOINN uolsuexa zez ap 146 es3s coco J fpugu Wwepow 390 uo yams esinop 394 wepow 00SZ WOSINN ssalo SAlsoay pue NLUSUBI agea wspouw nn 90000 N L eue WepoW E CG S O solnsp 310 Od Mm LJ 310 uo yams 0097 WOOINN SSG19 219994 pue HILUSUEBI SIYEI ue pau JINN x lt p L J fpugu Wepow E O E c O Di 390 uo yojims 005Z NODINN uoisuspxa zez 91489 zyres On Jabeuey Wwapow TO N UN a01Aap 390 wapow 0000 uolsuayxy zez 1q 3 3yblens e gt 1n8p 390 eseu o o udlsudyxy zez aide JUBILOS 19 Electro Industries GaugeTech Appendix 4 Specifications Power Voltage Requirements 9 30V DC or 7 20V AC Maximum Power Consumption 3VA Isolation Voltage 2500V RMS RS232 to RS485 Data Rate 300 57 600 baud LED Indicators ON power ERR error RX receive CTRL control TX transmit Switches DTE DCE selection RS232 baud rate selection RS485 baud rate selection H alf full duplex selection HD FD
6. M odem M anager 1 EIG Model MM1 a smart RS485 to RS232 converter with modem enhancing features User Manual and Reference Guide Version 1 7 Modem M anager 1 User Manual and Reference Guide Version 1 7 Published by Electro Industries G augeT ech 1800 Shames Drive Westbury NY 11590 All rights reserved No part of this publication may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying recording or information storage or retrieval systems or any future forms of dupli cation for any purpose other than the purchaser s use without the expressed written permission of Electro Industries G augeTech 1998 Electro Industries G augeTech Released November 1998 Printed in the United States of America Customer Service and Support Customer support is available 9 00 a m to 4 30 p m eastern standard time M onday through Friday Please have the model serial number and a detailed problem description available If the problem concerns a particular reading please have all meter readings available When re turning any merchandise to ElG a return authorization number is required For customer or technical assistance repair or calibration phone 516 334 0870 or fax 516 338 4741 Product Warranty Electro Industries G augeTech warrants all products to be free from defects in material and workmanship for a period of one year from the date of shipment During th
7. Power quality monitoring E Onboard data logging for trending power usage and quality m Disturbance analysis EIG manufactures both single and multifunction digital power monitors T hese utility grade devices are highly reliable and sophisticated Futura Series As the ultimate power quality monitor the Futura is widely used at automated substations In addition to having nearly all of the capabilities of DM meters it also handles WR Power quality monitoring H High accuracy AC metering E Onboard data logging mM Onboard fault and voltage recording DM Series DM meters are the substation standard for many utilities and large industrial companies T hese three phase multifunction monitors measure every aspect of power m Wattage voltage amperage var VA power factor frequency and harmonics T HD E Protocols M odbus M odbus Plus DNP 3 0 and Ethernet E Analog outputs 0 1 and 4 20mA Electro Industries GaugeTech iii Single Function Meters m AC voltage and amperage m DC voltage and amperage m AC wattage Single phase monitoring with maximum and minimum demands H Transducer readouts Portable Analyzers H Power quality analysis m Energy analysis iv Electro Industries GaugeTech Modem Manager 1 Overview Problemi mermas s ate scm Ge od heats A oe Sevens ein Seal ice ee 1 glo e a ee hoe ele Ge kee doe Go be ket fd 2 Requirements cr ants a PS Del 2 Modens EECHER 2 Remote Devices e 2 Installati
8. al would be turned to the baud rate set in the terminal program m To enter Command mode from Normal mode use Windows 95 H yperTerminal or another communications program to send the following escape sequence to the M odem M anager Note The keystrokes must be made less than two seconds apart lt 2 second pause gt lt 2 second pause gt Electro Industries GaugeTech 5 Mm n Command mode the following can be programmed or read e The number of rings M odem M anager 1 is to wait before having the modem answer the phone The modem initialization string This can also be erased The programmable unit ID a maximum of thirty characters This can also be erased Mm n Command mode you can read e TheM odem M anager s status e TheM odem M anager s product code M odem M anager 1 e The version numbers of the operating and boot software 6 Electro Industries GaugeTech Command Mode Commands Ring Number Program Ring Number is used to specify the number of rings after which the M odem M anager will have the modem answer the phone Use Read Ring Number to check the current setting m Program Ring Number e Type Rn Enter where n is a digit 1 9 indicating the number of rings e RO lt CR gt will be sent back confirming that the command has been executed See the Command Summary in the Appendix for details m Read Ring Number e Type RR Enter e RRn lt CR gt will be returned where n is
9. an RS485 port 2 Electro Industries GaugeTech Installation The majority of modems can be used right out of the box See Simple Installation for the quickest way to set up a remote system This works in almost all cases U se the Advanced Installation if your modem requires an initialization string or you would like to specify the number of rings after which the modem will answer Simple Installation Turn the M odem M anager s RS485 BAUD dial to reflect the RS485 bus baud rate Turn the M odem M anager s RS232 BAUD dial to MODEM m SlidetheM odem M anager s DCE DTE switch to DTE E Slide the M odem M anager s Half Duplex Full Duplex switch to H alf Duplex for a 2 wire RS485 bus or Full Duplex for a 4 wire RS485 bus m Plug the M odem M anager s 9V AC DC plug into an outlet m Connect the phone line to the modem m Usea serial cable to connect the modem to the M odem M anager m Connect the M odem M anager to the RS485 bus See the appendices for diagrams of a typical RS485 bus connection m Turn the modem on and then turn the M odem M anager on Advanced Installation An advanced installation is necessary only if you need to control the number of rings after which the modem will answer or your atypical modem requires a modem initialization string T his type of installation requires a computer to run a simple terminal program such as Terminal for Windows 3 11 or HyperTerminal for Windows 95 m Rings e Usea serial cabl
10. certified standards Disclaimer The information presented in this publication has been carefully checked for reliability how ever no responsibility is assumed for inaccuracies The information contained in this docu ment is subject to change without notice Electro Industries GaugeTech i Electro Industries GaugeTech Electro Industries G augeTech was founded in 1973 by engineer and inventor Samuel K agan Dr Kagan s first innovation which revolutionized the power monitoring field was the development of an affordable easy to use AC power meter In the 1980s Dr Kagan and his team at ElG developed a digital multifunction monitor This monitor with its ability to measure every aspect of power transformed AC power metering and power distribution Under Dr Kagan s leadership ElG again developed a product that surpassed everything else on the market the Futura device It supplied all the functionality of a fault recorder an event recorder and a data logger in the configuration of a single meter Today as a leader in the development and production of power monitoring products ElG aspires to attain zero defect manufacturing ii Electro Industries GaugeTech Products All of ElG s products are designed manufactured tested and calibrated at our facility in Westbury New York EIG manufactures the most sophisticated digital power monitors available Our products handle such things as m Multifunction power monitoring WR
11. cters 2 Enter K Enter N Enter P Enter Q Enter Electro Industries GaugeTech Output product code lt CR gt product code M M 1 s factory assigned product code Displays H elp menu Ix lt CR gt x code 0 unit ID has been erased 1 6 error in erasing unit ID Ix lt CR gt x code 0 unit ID has been programmed 1 6 error in programming unit ID IxID lt CR gt x code 2 unit ID follows 1 no unit ID has been programmed ID unit ID K lt CR gt verifies that M M 1 has been reset N lt CR gt verifies that M odem M anager 1 is in Normal mode Pn lt CR gt n three digit version number of MM 1 s operating software Qn lt CR gt n three digit version number of MM 1 s boot software 13 Description Input Output Ring Rn Enter Rx lt CR gt Number n number of rings x code Program 1 9 MM Lis to wait 0 ring number has been before having the programmed modem answer 1 7 errorin programming ring number Ring RR Enter RR n lt CR gt Number n number of rings 1 9 Read MM 1 sto wait before having the modem answer Product Status S Enter Displays M odem M anager 1 parameters a communications program to send the following escape sequence to the M odem M anager lt 2 second pause gt lt 2 second pause gt Note that the keystrokes must be made less than two seconds apart ILS To enter Command mode from Normal mode use 14 Electro Industries GaugeTech Ap
12. e returned Electro Industries GaugeTech 11 Description Echo Status Read RS485 Port Data Bit Modem String Remove Modem String Program Modem String Read Change Mode to Program 12 Appendix 1 Command Summary Input A Enter B Enter BE Enter BT Enter COLE nter C 1string E nter string modem initial ization string up to 254 characters C2 Enter D Enter Output A lt CR gt verifies that M M 1 is responding properly Babc lt CR gt a RS232 BAUD switch position 0 fixed baud rate 1 MODEM 2 PROGRAM b M M 1 s current mode 0 Program mode 1 Command mode c operating software s check sum status code BO lt CR gt Talk at 11 bit data BO lt CR gt Talk at 10 bit data default Cx lt CR gt x code 0 string has been erased 1 7 error in erasing string Cx lt CR gt x code 0 string has been erased 1 9 error in programming string Cx string lt CR gt x code 2 string follows 1 no string has been programmed string modem initialization string D lt CR gt verifies that M M 1 is in Program mode Electro Industries GaugeTech Description Product Code Read Help Unit ID Remove Unit ID Program Unit ID Read Reset Change Modeto Normal Operating Software Version Boot Software Version Input E Enter HIH elp IOLE nter I 1ID E nter ID unique user assigned unit ID up to 30 alphanumeric chara
13. e to connect the computer to M odem M anager 1 e Slide the M odem M anager s DCE DTE switch to DCE Electro Industries GaugeTech e Turn the M odem M anager s RS232 BAUD dial to the baud rate set in the terminal program e Turn the M odem M anager on e Type and wait two seconds This will put the M M 1 in Command mode e Type Rn Enter where n is the number of rings after which the modem will answer RO lt CR gt should be returned To verify type RR Enter RR n lt CR gt will be returned where n is the number of rings entered in the preceding step Disconnect the computer Complete the installation by following the steps listed above in Simple Installation M odem String A few manufacturers require that a startup string be sent to their modem when it is first turned on Once M odem M anager 1 is given the string it will handle this automatically Consult your modem manual to find out if this is required and to deter mine the proper string The U S Robotics Sportster for example requires the string AT amp F1 To store the string in M M 1 e Usea serial cable to connect the computer to M odem M anager 1 e Slide the M odem M anager s DCE DTE switch to DCE e Turn the M odem M anager s RS232 BAUD dial to the baud rate set in the terminal program Turn the M odem M anager on e Type and wait two seconds This will put the MM 1in Command mode e Type C1 gt string Enter where strin
14. e warranty period we will at our option either repair or replace any product that proves to be defective To exercise this warranty fax or call our customer service department You will receive prompt assistance and return instructions Send the instrument transportation prepaid to EIG at 1800 Shames Drive Westbury NY 11590 Repairs will be made and the instrument will be returned Limitation of Warranty This warranty does not apply to defects resulting from unauthorized modification misuse or use for any reason other than electrical power monitoring OUR PRODUCTSARE NOT TO BE USED FOR PRIMARY OVER CURRENT PRO TECTION ANY PROTECTION FEATURESIN OUR PRODUCTS ARE TO BE USED FOR ALARM OR SECONDARY PROTECTION ONLY THIS WARRANTY ISIN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ELECTRO INDUSTRIES GAUGETECH SHALL NOT BE LIABLE FORANY INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES ARISING FROM ANY AUTHORIZED OR UNAUTHORIZED USE OF ANY ELECTRO INDUSTRIES GAUGETECH PRODUCT LIABILITY SHALL BE LIMITED TO THE ORIGINAL COST OF THE PRODUCT Statement of Calibration Our instruments are inspected and tested in accordance with specifications published by Electro Industries G augeTech The accuracy and calibration of our instruments are traceable to the National Bureau of Standards through equipment that is calibrated at planned intervals by comparison to
15. g is the modem initialization string The response will be CO lt CR gt U se the following format to program multiple mo Ls dem strings of up to a total of 254 characters C1 gt string 1 lt gt string 2 lt gt string 3 stringn lt CR gt To verify type C 2 Enter C string lt CR gt will be returned where string is the modem initialization string If no string has been programmed C1 lt CR gt will be returned e Disconnect the computer Complete the installation by following the steps listed above in Simple Installation Electro Industries GaugeTech Operation Operating Modes M odem M anager 1 has three operating modes Normal mode and Command mode are the two typically used Program mode which is not covered in this manual is designed to be used for flash upgrades as additional features are made available Normal Mode In Normal mode M odem M anager transfers data between its RS232 side and its RS485 side usually it is positioned between a modem and remote devices There are no commands that can be executed in Normal mode Command Mode Command modeis used with a standard or laptop computer to set parameters or check the M odem M anager s status or software version The functions available in this mode are described below Typically a standard serial cable is used to connect the computer to the M odem M anager The M odem M anager s DCE DTE switch would then be set to DCE and its RS232 BAUD di
16. not a simple task If all goes well and there is a good phone connection the system works Often it does not Also to reprogram a modem you must implement the change at the remote site M ore often than not two people are needed to effect a modem change to test the modem another technician is needed at the other end to verify the success of the communication These issues combine to make modem programming difficult time consuming and often expensive Solution M odem M anager 1 solves all of these problems It contains all the lines necessary to control the modem Its large buffer and independent communication ports permit modems to nego tiate optimum communication rates while allowing fixed RS485 bus rates It initializes the modem it answers the phone when a call is received and it controls the flow of data to the modem during dropouts This eliminates most common problems This device improves all forms of communication from noisy phone lines to cellular com munications and radio transmissions While no communication is in progress the M M 1 periodically resets the modem every five to ten minutes to clear any glitches or hangups due to power dropouts In the vast majority of cases no modem programming is required See Installation below for the simple way to set up a remote system Requirements Modems The local and remote modems can be of any type or speed Remote Devices These can be any devices that communicate over
17. on Sie no dre A an 3 Simple Installation o Boe e Pal eee dra 3 Advanced Installation 2 3 Operation Operating Modes e ati a e a a a a 5 Normal A a a a o ae a a o a Tar oS 5 Command si vato ae E ae Yo oie See Et a 5 Command ModeCommands 7 Ring iN amber statue ei Sb iii aa Le 7 Modem String AA ea e a o Sah Pe vr a 7 Modem M anager Unit ID 8 ReturntoNormalMode 0 eee ee ee ee 8 ECHO gut Ata Ate th oboe de es doth dy th ok ade ea Po a eA ha ed a 9 M odem M anager Status 2 1 4 4 9 Product COJE mis ari tt e Ee ee ee a 9 ResettingtheModemManager 2 ee ee 10 Operating Software Version 10 Boot Software Version 10 Held sc os os PA ela 10 Product Status aa ri aa 11 RS485 Port Data Bit 11 Electro Industries GaugeTech v Appendices vi Electro Industries GaugeTech Appendix 1 Command Summary 1 ee 4 o 12 Appendix 2 RS485 Bus Connections Overview Four Wire Full Duplex 15 Details Four Wire Full Duplex 16 Overview Two Wire Half Duplex 0 0 0 0 2 ee 17 Details Two Wire Half Duplex o a a aa 18 Appendix 3 RS232 Connections gt se otc ca aa a a 19 Appendix 4 Specifications 20 Appendix 5 Bracket Installation o a a a a a a 21 Appendix 6 Mounting Information 22 Overview Problem A diagram of a typical remote communication over a phone line to a bus of RS485 devices is shown below
18. pendix 2 RS485 Bus Connections Overview Four Wire Full Duplex Modem or Computer D H D This shows the crossover from R to T between Modem Manager 1 and the rest of the gt bus It does not represent a twisted pair D 3 2 Modem 8 ZS Manageri Y a H x 0 Electro Industries GaugeTech 15 16 RS485 Bus Connections Details Four Wire Full Duplex RS485 Lo Communications Lo Port ro zo Model SF485DB eo RS485 Lo Communications dp Port 0 Model SF485DB oo This shows the crossover from R to T between Modem Manager 1 and the rest of the bus It does not represent a twisted pair 00000 LL Verte Ger Modem Manager 1 r Modem Enlarged View of Twisted Pair Segments Receive Pair POSSST Transmit Pair PESSST 9 Y 11 L Twisted Pair Segment Electro Industries GaugeTech R R T T RS485 Bus Connections Overview Two Wire Half Duplex Modem or Computer Modem Manager 1 Electro Industries GaugeTech 17 18 Electro Industries GaugeTech RS485 Communications Port Model S
19. t received anything from either a computer or a remote device m After a reset the M odem M anager automatically reverts to Normal mode and transmits the modem initialization string if any E To manually reset the M odem M anager use the following command See the Command Summary in the Appendix e Type K Enter e K lt CR gt will be returned indicating that the M odem M anager has been reset Operating Software Version M Type P Enter mM Pn lt CR gt will be returned where n is the three digit version number of the operating software Boot Software Version mE Type Q CR mM Qn lt CR gt will be returned where n is the three digit version number of the boot software Help M Type H Enter m A Help menu will be returned listing all Command M ode Commands 10 Electro Industries GaugeTech Product Status m Type S Enter m Thefollowing M odem M anager 1 parameters will be returned Boot Version e Software Version e RS232 Switch Modem on RS232 e Current M ode Ring Number e RS485 Data Bit e UserID Modem String RS485 Port Data Bit Use this command when you wish to transmit data from an 11 bit port The M odem M anager will receive the 11 bit data at the RS485 port convert it to 10 bit data and transmit it through the RS232 port M To talk at 11 bit data Type BE Enter BO lt CR gt will be returned Mm To talk at 10 bit data the default value e Type BT Enter e B0 lt CR gt will b
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