VARIO AI 8/SF - pma
Contents
1. 6226A016 Figure 12 Measuring linked voltages 9499 040 67911 39 VARIO AI 8 SF Current Loops If the IB IL AI 8 SF terminal is used to measure currents in current loops please ensure that the eight current inputs operate on a common ground potential single ended Thus the measured input should always be on the GND potential with the minus input 6226A017 Figure 13 Measuring currents 40 9499 040 67911 VARIO AI 8 SF Tolerance and Temperature Response Voltage inputs TA 25 C 77 F OVto5V 5V 1 0 mV 5 0 mV 0 02 0 10 OV to 10 V 10 V 2 0 mV 10 0 mV 0 02 0 10 0 V to 25 V 25 V 5 0 mV 25 0 mV 0 02 0 10 OV to 50 V 10 0 mV 50 0 mV 0 02 0 10 TA 25 C 55 13 F 131 F 0Vto5V x5V 5 0 mV 15 0 mV 0 10 0 30 0 V to 10 V 10 V 10 0 mV 30 0 mV 0 10 0 30 to 25 V 25 V 25 0 mV 75 0 mV 0 10 0 30 OV to 50 V 50 0 mV 150 0 mV 0 10 0 30 Current Inputs Ta 25 C 77 F mA to 20 mA 4 mA 8 0 pA 40 0 pA 0 04 0 20 to 20 mA 20 mA 0 mA to 40 mA 16 0 pA 80 0 pA 0 04 0 20 40 mA2. TFF9 32761 gt 5 375 210 75 gt 26 875 TFF8 32760 4 9988 to 9 9975to 24 9939 to 5 375 10 75 26 875 4000 16384 2 5 5 0 12 5 0008 8 1 221 mV 2 441 mV 6 104 mV 0000 0 0 0 0 FFF8 8 1 221 mV 2 441 mV 6 104 mV C000 16384 2 5 5 0 12 5 8000 32768 5 0 to 5 375 10 00 to 10 75 25 0 to 26 875 8001 32767 5 375 10 75 26 875 9499 040 67911 VARIO AI 8 SF Current Ranges TFF9 32761 2421 5 gt 443 0 TFF8 32760 19 9951 to 21 5 39 9902 to 0 4000 16384 10 0 20 0 0008 8 4 8828 9 7656 pA 0000 0 0 0 TFF9 32761 2421 5 gt 443 0 TFF8 32760 19 9951 to 21 5 39 9902 to 0 4000 16384 10 0 20 0 0008 8 4 8828 pA 9 7656 pA 0000 0 0 0 FFF8 8 4 8828 9 7656 pA C000 16384 10 0 20 0 8000 32768 20 0 to 21 5 40 0 to 43 0 8001 32767 21 5 43 0 7FFD 32765 gt 21 5 32764 19 9961 to 21 5 4000 16384 10 000C 12 4 003906 0004 4 3 2 to 4 0 0006 6 32 9499 040 67911 21 VARIO AI 8 SF IB RT Format The measured value is represented in bits 14 to 0 An additional bit bit 15 is available as a sign bit This format corresponds to the data format used on INTERBUS RT modules Diagnostic codes and error bits are not defined in this data format An open circuit is indi
3. 8001 OR gt 21 6746 gt 43 3493 32512 21 6746 43 3493 7530 30000 20 0 40 0 0001 1 0 66667 pA 1 3333 pA 0000 0 0 0 0000 0 lt 0 lt 0 8001 OR gt 21 6746 gt 43 3493 32512 21 6746 43 3493 7530 30000 20 0 40 0 0001 1 0 6667 1 3333 0000 0 0 0 1 0 6667 1 3333 pA 8ADO 30000 20 0 40 0 8100 32512 21 6746 43 3493 8080 UR 21 6746 43 3493 8001 OR gt 21 339733 70 32512 21 339733 7530 30000 20 0 0001 1 4 00053333 0000 0 4 0 to 3 2 8002 Open circuit lt 3 2 9499 040 67911 19 VARIO AI 8 SF IB ST Format The measured value is represented in bits 14 to 3 The remaining 4 bits are sign measuring range and error bits This format corresponds to the data format used on INTERBUS ST modules Measured value representation in IB ST format 12 bits 15 14 43 12 11 40 9 8 7 6 5 4 3 2 1 0 SB Analog value 0 4 OC OR SB Sign bit OC Open circuit 0 4 4 to 20 mA measuring range OR Overrange under range Significant Measured Values Voltage Ranges 7FF9 32761 gt 5 375 gt 10 75 gt 26 875 gt 53 75 TFF8 32760 4 9988 to 9 9975to 24 9939 to 49 9878 to 5 375 10 75 26 875 53 75 4000 16384 2 5 5 0 12 5 25 0 0008 8 1 221 mV 2 441 mV 6 1025 mV 12 205 mV 0000 0 0 0 0 0
4. TA 25 C 55 13 F 131 F 0 mA to 20 mA 28 0 pA 80 0 pA 0 14 0 40 4 mA to 20 mA 20 mA 0 mA to 40 mA 56 0 pA 160 pA 0 14 0 40 40 mA 9499 040 67911 41 VARIO AI 8 SF Additional Tolerances for Electromagnetic Interference Electromagnetic fields lt 42 lt 42 field strength 10 V m according to EN 61000 4 3 IEC 61000 4 3 Conducted interference lt 1 lt 1 Class 3 test voltage 10 V according to EN 61000 4 6 IEC 61000 4 6 Fast transients bursts gt 1 gt 41 4 kV supply 2 kV input according to EN 61000 4 4 IEC 61000 4 4 42 9499 040 67911 VARIO AI 8 SF Technical Data Housing dimensions width x height x depth 48 8 mm x 120 mm x 71 5 mm 1 921 in x 4 724 in x 2 815 in Weight 125 g without connectors Operating mode Process data operation with 2 words Type of sensor connection 2 wire technology Permissible temperature operation 25 C to 55 13 F to 131 F Permissible temperature storage transport 25 C to 85 13 F to 185 F Permissible humidity operation humidity gt 8596 must be taken 3 Between 25 C and 55 C 13 F to 131 F appropriate measures against increased 75 on average 85 occasionally Permissible humidity storage transport 3 For a short period slight condensation may appear on the outside of t
5. Length code 02nex Process data channel 32 bits Input address area 4 bytes Output address area 4 bytes Parameter channel PCP 0 bytes Register length bus 4 bytes 9499 040 67911 VARIO AI 8 SF Process Data Words Process Data Output Words for the Configuration of the Terminal see page 8 Process Data Output Word 0 OUT O0 Process Data Output Word 1 OUT 1 Byte 0 Byte 1 Byte 2 Byte 3 OUT O Byte bit Byte view Bit 765141312111017 Assignment OUT 1 2 1 0 7 6e 5 4 3 2 1 0 Assignment Byte bit Byte Bit Process Data Input Words see page 12 Process Data Input Word 0 IN 0 Process Data Input Word 1 IN 1 Byte 0 Byte 1 Byte 2 Byte 3 IN 0 Byte bit Byte view Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Assignment 15 14 13 12111 10 9 8 7 6 5 41 31 2 1 Depends the command IN 1 Byte bit Byte view Bit 6 5 4 13 2 1 7 6 5 4 3 21110 Assignment 15 14 13 12111 10 19 8 7 6 5 41 31 2 1 Depends the command 9499 040 67911 N VARIO AI 8 SF Process Data Output Words OUT 0 and OUT 1 The terminal must be configured using the two 3 After applying voltage power up t
6. Bit Assignment Channel group 10 9 Read measured value of channel x 8 7 0 0 1 00 Read configuration of channel x 3C00hex Read firmware version and module identification 4 00 Configure channel x 5x00hex Configure channel x and read measured value of channel x 6000hex Configure entire terminal all channels 7X00hex Commands for groups without mirroring 22 24 20 Channel number Yo Yo Group number OUT O Bit 10 to bit 8 channel number 224140 or group number eo om AI o 0 AJ WwW MY gt 000 O 4x8 bit group A channel 1 2 3 and 4 001 1 4x 8 bit group B channel 5 6 7 and 8 010 2 Reserved 011 3 100 4 2 16 bit group A channel 1 and 2 101 5 2 x 16 bit group B channel 3 and 4 110 6 2x 16 bit group C channel 5 and 6 111 7 2 16 bit group D channel 7 and 8 9499 040 67911 VARIO AI 8 SF OUT 1 Parameter Word The parameters for the commands 4x004 5 00 600044 must be specified in OUT 1 This parameter word is only evaluated for these commands Bit Assignment OUT 1
7. 15 14 13 12 11 10 0 0 0 0 0 0 9 8 7 If invalid parameters are specified in the parameter word the command will not be exe cuted The command is confirmed in the input words with the set error bit Bit 9 and bit 8 00 0 16 sample average default 01 1 No mean value generation 10 2 4 sample average 11 3 32 sample average Bit 6 to bit 4 000 0 IB IL 15 bits default 001 1 IB ST 12 bits 010 2 IB RT 15 bits 011 3 Standardized display 100 4 PIO for the 4 mA to 20 mA range only 101 5 110 6 Reserved 111 7 10 9499 040 67911 VARIO AI 8 SF Bit 3 to bit 0 0000 0 0 V to 10 V default 1000 8 0 mA to 20 mA 0001 1 10 V 1001 9 20 mA 0010 2 OV to5V 1010 10 4mAto 20 mA 0011 3 5 V 1011 11 Reserved 0100 4 to 25 V 1100 12 OmAto40 mA 0101 5 25 V 1101 13 40mA 0110 6 0 V to 50 V 1110 14 Reserved 0111 7 Reserved 1111 15 Reserved The differential voltage between different terminal inputs must not exceed 50 V If for example the 0 V to 50 V range is used on one channel the use of bipolar ranges is not permitted on any other channel 9499 040 67911 11 VARIO AI 8 SF Process Data Input Words IN 0 and IN 1 The measured values and diagnostic messages diagnostic codes are transmitted to the controller board or computer us
8. 5x00 8004 The configuration just specified is Check and correct configuration invalid 1x00 8010 There is no valid configuration for Configure channel the channel scanned 4x00 and The parameters are mirrored This Check and correct parameters 6000 is usually caused by invalid para meters 3 00 No diagnostic code PF A peripheral fault is reported to the higher level control system In addition to the indicator in the input words for diagnostic codes 8040 module faulty and 8020 I O supply voltage faulty a peripheral fault is reported to the higher level control system 3 The IB IL and standardized display formats offer additional diagnostic functions These are specified on page 17 and page 24 30 9499 040 67911 VARIO AI 8 SF Startup Options The following startup options illustrate how to use the IB IL AI 8 SF terminal Standard Method 1 Task All input channels are to be operated the same configuration 6000hex Filtering by mean value generation 32 sample average 11 1 346 Format IB IL 000 Measuring range 10 V 0001 145 Procedure 1 Install the terminal 2 Connect the voltage power up 3 Configure the terminal initialization phase e g in the initialization phase of the application program 4 Read the measured value for each channel in turn Initialization phase According to the task the appearance of the proces
9. 19 999385 39 9987793 8000 32768 lt 20 0 lt 40 0 TFFF 32767 gt 19 9995117 32766 19 9990234 4000 16384 12 0001 1 0 4884 0000 0 4 0 0000 0 3 2 to 4 0 TFFF 32767 43 2 9499 040 67911 23 VARIO AI 8 SF Standardized Display Format The data is represented in bits 14 to 0 An additional bit bit 15 is available as a sign bit In this format data on the measuring range is standardized and represented in such a way that it in dicates the corresponding value without conversion In this format one bit has the following validity for the measuring ranges stated OVto5V 5V 1 mV 0V to 10V 10 V 1 mV to 25 V 25 V 1 mV 0 V to 50 V 10 mV 0 mA to 20 mA 4 mA to 20 mA 1 pA 0 mA to 40 mA 10 pA This format supports extended diagnostics Values gt 8000 and gt 8100 indicate an error The following diagnostic codes are possible 8001 Overrange 8002 Open circuit 8004 Measured value invalid no valid measured value avai lable e g because the channel was not configured 8010 Configuration invalid 8020 I O supply voltage faulty 8040 Module faulty 8080 Under range Measured value representation in standardized display format 15 bits 15 14 13 12 11 10 9 8 7 6 5 4 1 0 SB Analog value SB Sign bit 24 9
10. corresponds with the display in the input word IN 1 for the 0 00 and 5x00hex commands Example 2 x 16 Bit Group A Channels 1 and 2 7400 Command IN 0 Bit 15 14 33 122 41 0 9 8 7 6 5 21110 Assignment IN 1 Bit 15 14 433 12 11 0 9 8 7 6 5 21110 Assignment 9499 040 67911 15 VARIO AI 8 SF Group Commands for Four 8 bit Channels 7000 and 7100 With commands for four channels the analog values for two channels are mapped to every input word The measured value for each channel is represented in eight bits This measured value corre sponds to bits 15 to 8 in the format displays of a 16 bit value Example 4 x 8 Bit Group A Channels 1 2 3 and 4 7000 ex Command IN O Bit Assignment Bit Assignment The status bits in IB ST format and the diagnostic messages in IB IL and standardized display format are not displayed in this configuration 16 9499 040 67911 VARIO AI 8 SF Formats for Representation of Measured Values To ensure that the terminal can be operated in previously used data formats the measured value re presentation can be switched to different formats The IB IL format is the default Abbreviations used in the following tables OR Overrange UR Under range IB IL Format The measured value is represented in bits 14 to 0 An additional bit bit 15 is available as a sign bit This for
11. 0001 1 10 0 pA 8001 OR 421 339 0000 0 0 43 17339 21 339 0000 0 lt 0 80 16000 20 0 0001 1 4 001 0000 0 4 0 to 3 2 8002 Open circuit lt 3 2 8001 OR gt 21 6747 54 21674 21 6747 4 20 20000 20 0 0001 1 1 0 pA 0000 0 0 FFFF 1 0 001 B1E0 20000 20 0 56 21674 21 6747 8080 UR 21 6747 9499 040 67911 VARIO AI 8 SF Examples of Measured Value Representation in Various Data Formats Measuring range 0 mA to 20 mA Measured value 10 mA Input data word IB IL 3A98 15 000 10 mA IB ST 4000 16 384 10 mA IB RT 4000 16 384 10 mA Standardized display 2710 10 000 10 mA Measuring range 10 V Measured value 5 Input data word IB IL 3A98 15 000 5V IB ST 4000 16 384 5V IB RT 4000 16 384 5V Standardized display 2710 5 000 5V 28 9499 040 67911 VARIO AI 8 SF PIO Format The PIO format enables high resolution representation of measured values in the 4 mA to 20 mA cur rent measuring range In this format an imaginary measuring range of 0 mA to 25 mA is divided into 216 quantization steps 65 536 steps Thus unipolar measured currents with a resolution of 0 38 p A LSB can be represented Although this format is designed for the 4 mA to 20 mA range signals bet ween 0 mA and 24 mA can be detected so the overrange limits and the open circuit threshold in the higher lev
12. 15 14 13 2 41 0 9 8 7 6 5 4 3 2 1 0 Assignment 1 0 9499 040 67911 13 VARIO AI 8 SF For the 0 00 and 5 00 commands IN 1 contains the analog measured value IN 1 Bit 15 14 33 12 1111019 817 6 5 4 3 2 1 0 Assignment Format MSB LSB IB IL 7 2 1 15 Standardized o 5 4 J oc on Figure 8 Representation of the measured values in the different formats SB Sign bit OC Open circuit Analog value OR Overrange 0 4 4 to 20 mA measuring range MSB Most significant bit LSB Least significant bit The individual formats are explained in the Section Formats for Representation of Measured Values auf Seite 17 14 9499 040 67911 VARIO AI 8 SF IN 0 and IN 1 for the Group Commands 7 00 IN O IN 1 Result Result Figure 9 Process data input words 6226A013 For the group commands 7x00 both input words contain the measured values of the channels that correspond with the group command Group Commands for Two 16 bit Channels 7400 7500 7600 and 7700 With commands for two 16 bit channels the analog value of one channel is mapped to every input word The display
13. 499 040 67911 VARIO AI 8 SF Significant Measured Values Voltage Ranges 8001 OR gt 45 419 gt 54 187 gt 5 419 152 5419 5 419 54 187 5 419 1388 5000 5 0 50 0 5 0 0001 1 1 0 mV 10 0 mV 1 0 mV 0000 0 0 0 0 0000 1 lt 0 lt 0 1 0 mV EC78 5000 5 0 EAD5 5419 5 419 8080 UR gt 5 419 8001 gt 10 837 gt 10 837 2 55 10837 10 837 10 837 2710 10000 10 0 10 0 0001 1 1 0 mv 1 0 mv 0000 0 0 0 0000 0 0 FFFF 1 1 0 mV D8FO 10000 10 0 5 10837 10 837 8080 UR lt 10 837 9499 040 67911 25 VARIO AI 8 SF 8001 OR gt 27 093 gt 27 093 69D5 27093 27 093 27 093 61 8 25000 25 0 25 0 0001 1 1 0 mV 1 0 mV 0000 0 0 0 0000 0 lt 0 1 1 0 mV 9E58 25000 25 0 962 27093 27 093 8080 UR 27 093 26 9499 040 67911 VARIO AI 8 SF Current Ranges 8001 OR gt 21 6747 8001 OR gt 43 349 54AA 21674 21 6747 10EE 4334 43 349 4E20 20000 20 0 OFAO 4000 40 0 0001 1 1 0 pA 0001 1 10 0 0000 0 0 0000 0 0 0000 0 lt 0 FFFF 1 10 0 pA F060 4000 40 0 EF12 4334 43 349 8080 UR 43 349 8001 OR gt 43 3493 10 4334 43 3493 4000 40 0
14. AI 8 SF terminal makes closed loop control tasks particularly easy to carry out The terminal supports the advantages of INTERBUS with regard to time equidistance As the terminal scans input signals synchronously with the bus clock and the bus runtime has a very small jitter the input signals can be scanned equidistantly Thus the measured results are particularly sui table for use in closed loop control The following configurations and measures are recommended Measured value acquisition according to standard method 1 or 2 In special cases the group commands 7 00 can be an exception Filtering no mean value generation As total accuracy is often irrelevant in closed loop control tasks filtering is not ne cessary This increases the dynamic re sponse of the terminal and speeds up the closed loop control circuit Adjust the INTERBUS cycle time to the firm ware runtime Example in standard method 1 the firm ware runtime is 800 us i e the INTERBUS cycle time should be set to 800 In applications in which an 8 bit resolution is sufficient group commands 7000 and 7100 can be used to read four channels si multaneously Scanning is synchronous with the bus clock here too Four channels require 1500 us 38 9499 040 67911 VARIO AI 8 SF Signal Scanning or Fast Sudden Signals The VARIO AI 8 SF terminal is ideal for scanning signals As a result of the high input cut off fr
15. DENDI 6 Process Data Words de deed 7 Process Data Output Words OUT 0 and 1 seem 8 Process Data Input Words IN 0 and 12 Formats for Representation of Measured Values sss eee 17 Process Data Input Words in the Event of an Error 30 Startup Options iis oie feed a e ete aee ist qe edes 31 Application Notes Jo 1 torto 1 1 1 1 e e ot uda tar ree eee 38 Tolerance and Temperature Response sss ne 41 Technical Data ce drug 43 Ordering ien E a E Ht P van b e te eU a EM LH ge e ied te 46 2 9499 040 67911 VARIO AI 8 SF Local Diagnostic Indicators and Terminal Assignment Local Diagnostic Indicators D Green Bus diagnostics Terminal Assignment for Each Connector 1 1 U1 Voltage input channel 1 2 1 U2 Voltage input channel 2 1 2 11 Current input channel 1 2 2 12 Current input channel 2 1 3 2 3 1 2 Minus input for both cur rent and voltage 1 4 2 4 Shield Shield connection 6226A003 Figure2 VARIO AI 8 SF with an appropriate connectors Installation Instructions High current flowing through potential jumpers Uy and Us causes the temperature of the potential jumpers and the internal temperature of the t
16. T 1 0000 Command executed successfully IN O 0000hex IN 1 XXXXhex Error during execution IN O 8000hex IN 1 YYYYhex Read measured value for channel 2 0 0100hex OUT 1 0000 Command executed successfully IN O 0100hex IN 1 XXXXhex Error during execution IN O 8100hex IN 1 YYYYhex and so on until Read measured value for channel 8 0 0700 OUT 1 0000p ex Command executed successfully IN O 0700hex IN 1 XXXXhex Error during execution 8700hex IN 1 YYYYhex 32 9499 040 67911 VARIO AI 8 SF Evaluate and remove errors Configure terminal 6000 0301 Read measured value of channel n 0x00 0000 Initialization Cyclic program sequence for reading the measured values of channels 1 to 8 6226A014 Figure 10 Schematic initialization and cyclic program sequence when configuring the entire terminal 9499 040 67911 33 VARIO AI 8 SF Standard Method 2 Task The input channels are to be operated in different configurations The channels are to be configured first 4x00hex After configuration the measured values are to be read 0x00 Configuration of the channels Filtering by mean No filtering 16 sample average 4 sample average value generation 01 00 10 2dec Format IB IL IB IL IB IL 000 1 Oqec 00061 000pin Mea
17. VARIO 8 SF Extension Module With Eight Analog Input Channels User Manual 11 2001 62260001 3 This data sheet is only valid in association with the documents of the used fieldbus coupler Function The terminal is designed for use within an VARIO station It is used to measure analog vol tage or current signals Features Eight analog single ended signal inputs for the connection of either voltage or current si gnals Sensors are connected using 2 wire techno logy Various current and voltage measuring ran ges Channels are configured independently of one another using the field bus Measured values can be represented in five different formats 16 bit analog to digital converter Process data multiplex operation Diagnostic indicators Figure 1 6226A002 VARIO AI 8 SF with connectors All modules will be delivered including connectors and labeling fields 9499 040 67911 VARIO AI 8 SF Table of Contents E 1 Table of Contents 2 d beate cercate apt i Een tee c px 2 Installation Iristr ctions RE e ER bu ERES 3 Internal Circuit DIagralm 5 eo e t EO DR o Ge ROO ien DE 4 Electrical Isolation E 5 Connection Notes ate te oe detto een de dans 5 Connection Examples 2 1 1 tee e e CR EC It ER ERA 6 Programming Data ime it niet I E
18. cated by the positive final value 7FFF pe Measured value representation in IB RT format 15 bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 SB Analog value SB Sign bit Significant Measured Values Voltage Ranges TFFF 32767 gt 44 999847 gt 9 999695 gt 24 999237 gt 49 998474 32766 4 999695 9 999390 24 998474 49 996948 4000 16384 2 5 5 12 5 25 0 0001 1 152 6 305 2 UV 762 9 uV 1 5259 mV 0000 0 0 0 0 0 7FFF 32767 gt 4 999847 gt 9 999695 gt 24 999237 7 32766 4 999695 9 999390 24 998474 4000 16384 2 5 5 0 12 5 0001 1 152 6 305 2 762 9 0000 0 0 0 0 FFFF 1 152 6 pV 305 2 uV 762 9 uV 000 1 16384 2 5 5 0 12 5 8001 32767 4 999847 9 999695 24 999237 8000 32768 lt 50 lt 10 0 lt 25 0 9499 040 67911 VARIO AI 8 SF Current Ranges 32767 gt 19 9993896 gt 39 9987793 32766 19 9987793 39 9975586 4000 16384 10 20 0001 1 0 6104 1 2207 0000 0 0 0 32767 gt 19 999385 gt 39 9987739 32766 19 998779 39 9975586 4000 16384 10 0 20 0 0001 1 0 6104 1 2207 0000 0 0 0 1 0 0006105 0 0012207 C000 16384 10 0 20 0 8001 32770
19. e quency 3 5 kHz there are no limiting elements in the analog stage The maximum signal fre quency that can be scanned depends on the firmware runtime and the INTERBUS cycle time The terminal measuring device can measure si gnals with a frequency of 1 800 us 1 25 kHz According to Shannon s sampling theorem therefore the signal frequency that can be scan ned is 1 25 kHz 2 0 625 kHz This signal frequency can only be achieved if sufficiently fast bus operation can be ensured The following configurations and measures are recommended Measured value acquisition according to standard method 1 or 2 Filtering no mean value generation This increases the dynamic response of the terminal Adjust the INTERBUS cycle time to the firm ware runtime This achieves discrete periods of scanning Example in standard method 1 the firm ware runtime is 800 us i e the INTERBUS cycle time should be set to 800 Linked Voltages When using linked voltages ensure that the VARIO AI 8 SF terminal has eight single ended inputs A common ground potential should be used with linked voltages As the terminal has many measuring ranges for example the 0 V to 50 V range and the resolution is high enough applications with several linked voltages can also be used without any problems
20. easured values Default setting over 16 measured values Conversion time of the A D converter 10 us maximum Process data update of the channels Bus synchronous Firmware runtime depending on the command 0 00 lt 800 us 5X00hex gt 850 us 7000 7100 1500 us 7400 7500 7600 7700 lt 1300 us Voltage Inputs voltage inputs and an analog reference poten tial or between two voltage inputs Input resistance gt 240 Limit frequency 3 dB of the input filter 3 5 kHz Behavior upon sensor failure Goes to 0 V Maximum permissible voltage between analog 50 V 44 9499 040 67911 VARIO AI 8 SF Current Inputs Input resistance 25 shunt Limit frequency 3 dB of the input filter 3 5 kHz Behavior upon sensor failure Goes to 0 mA 4 mA Maximum permissible voltage between analog current inputs and an analog reference poten tial or between two current inputs 2 5 V corresponds with 100 mA via the shunts Maximum permissible current in every input 100 mA Surge voltage and overcurrents 10096 overload maximum permitted To provide electrical isolation of the logic level and the area it is necessary to supply the bus terminal and the sensors which are connected to the described analog input ter minal from separate power supplies Interconnection of the 24 V power sup
21. el control system are freely definable Measured value representation in PIO format 16 bits 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Analog value Example of parameterization using PIO format Channel 1 Filtering 16 sample average Format PIO Measuring range 4 mA to 20 mA PIO format is only supported in this measuring range Option 1 Significant Measured Values 1 Configuring channel 1 OUT 0 4000hex OUT 1 004Anex 2 Reading the measured value OUT O 0000hex F5C2 62914 24 0 CCCD 52429 20 0 6666 26214 10 0 OUT 1 0000hex 0A3D 2621 1 0 0001 1 0 3815 pA Option 2 0000 0 0 Configuring channel 1 and reading the measu red value OUT O 5000 OUT 1 004 9499 040 67911 29 VARIO AI 8 SF Process Data Input Words in the Event of an Error In the event of an error the command is mirrored in the input word IN 0 and displayed with the set error bit The input word IN 1 indicates the error cause The following diagnostic codes are valid for configuration or hardware errors in all data formats 8020 X supply voltage faulty Check the supply voltage of the station head e g Check the potential jumper connection After module 8040 X Module faulty Replace module start 0x00 8004 There is no valid configuration for Configure channel the channel scanned
22. erminal to increase Observe the following instructions to keep the current flowing through the potential jumpers of the analog terminals as low as possible All of the analog terminals need a separate main circuit If this is not possible in your application and if you are using analog terminals in a main circuit together with other terminals place the analog terminals behind all the other terminals at the end of the main circuit 9499 040 67911 3 VARIO AI 8 SF Internal Circuit Diagram INTERBUS SUPER 24 V Ug 24 V Uy L A Figure 3 Key uP OPC EEPROM SUPER Internal wiring of the terminal points INTERBUS protocol chip Optocoupler Microprocessor Electrically erasable reprogram mable read only memory Microprocessor monitoring N 2 m v N 6226A004 Power supply unit with electrical isolation Reference voltage source Analog to digital converter Amplifier Multiplexer 9499 040 67911 VARIO AI 8 SF Electrical Isolation rg OUT 7 5V DC MB P m 7 5 V DC EB U 24 V DC i yo 5 FE potential Analog inputs 62260005 24 V DC MB Electrical isolation between area A and B F
23. he housing if for example the terminal is brought into a closed room from a vehicle 75 on average 8596 occasionally Permissible air pressure operation 80 kPa to 106 kPa up to 2000 m 6562 ft above sea level Permissible air pressure storage transport 70 kPa to 106 kPa up to 3000 m 9843 ft above sea level Degree of protection IP 20 according to IEC 60529 Class of protection Class 3 according to VDE 0106 and IEC 60536 local bus interface Data routing Communications power UL 7 5 Current consumption from 0 48 mA typical 55 mA maximum I O supply voltage Uana 24 V DC Current consumption to UANA 30 mA typical 35 mA maximum Total power consumption 1500 mW typical Connection method Potential routing 9499 040 67911 VARIO AI 8 SF Number 8 analog single ended inputs Signals resolution in the process data word quantization See tables in Section Formats for Representation of Measured Values auf Seite 17 Measured value representation Please read the notes on page 18 and IL and standardized display format In the formats IB IL 15 bit with sign bit IB ST 12 bit with sign bit IB RT 15 bit with sign bit Standardized display 15 bit with sign bit PIO 16 bit page 25 on measured value representation in IB Digital filtering mean value generation None or over 4 16 or 32 m
24. igure 4 Electrical isolation of the individual function areas Connection Notes Do not simultaneously apply current and voltage signals to one input channel as you will not obtain valid measured values Do not connect voltages above 2 5 V to a current input The electronics module will be damaged if the maximum permissible current of 100 mA is exceeded 3 Always connect the analog sensors using shielded twisted pair cables Connect the shielding to the Inline terminal using the shield clamp The clamp connects the shield directly to FE functional earth ground on the terminal side Additional wiring is not required Isolate the shielding at the sensor or connect it with a high resistance and a capacitor to the PE potential 9499 040 67911 VARIO AI 8 SF Connection Examples Observe the connection notes on page 5 Figure 5 shows the connection schematically without shield connector Connection of Active Sensors Slot 1 2 3 4 Channel 12345678 Voltage sensor to Current sensor to channel 1 channel 8 Figure 5 Connection of active sensors using 2 wire technology with shield connection The sensors have the same reference potential Programming Data ID code 5 95
25. ing the two process data input words The contents of the words vary according to the command IN 0 and IN 1 for Commands 0x00 to 6000 IN O IN 1 Result Mirroring of the 0000 0000 command code Error bit 6226A008 Figure 7 Process data input words IN 0 The output word OUT 0 which contains the command code is mirrored in the input word IN O This confirms that the command has been executed correctly If the command was not executed correctly the error bit is set in bit 15 of the input word 0 The error bit is set if one of the following reasons see page 30 There is no valid configuration for the channel scanned There was an invalid parameter during configuration A reserved bit was set The command is only mirrored if it has been executed completely That means for example that the 5 00 command is only mirrored after the value has been read and not after reconfiguration 12 9499 040 67911 VARIO AI 8 SF IN 1 The input word IN 1 varies depending on the command IN 1 contains the firmware version and module identification for the 3 00 command IN 1 Bit 15 14 13 1211 109 5 1441312 1110 Assignment Example 123 Al 8 SF Terminal equipped with firmware version 1 23 Al 8 15 For the commands 1x00hex 4 00 and 6000 IN 1 contains the mirroring of the specified con figuration IN 1 Bit
26. lic program sequence for reading the measured values of channels 1 to 8 Read measured value of channel n Evaluate and remove errors 0x00 0000 hex 6226A015 Figure 11 Schematic initialization and cyclic program sequence when configuring channels with dif ferent parameters 36 9499 040 67911 VARIO AI 8 SF Special Methods The group commands are regarded as special methods Task The measured values of channels 1 to 4 group A are to be read in one cycle and the measured values of channels 5 to 8 group B in another cycle 70004 for group A 7100 for group B The input channels are to be operated in different configurations e g as in example 2 Procedure 1 Install the terminal 2 Connect the voltage power up 3 Configure each individual channel in the terminal in turn initialization phase e g in the initialization phase of the application program As the channels are to have different configurations they must be configured using the 4x00hex command 4 Use group command 7000 to read the measured values for channels 1 to 4 simultaneously Then use group command 7100 to read the measured values for channels 5 to 8 Both groups can be reread cyclically Advantages of the Standard Methods Compared With the Special Methods The standard methods read the measured values with greater reliability because the command is mirrored for every measured value Thus it is
27. mat supports extended diagnostics Values gt 8000 lt 8100 indicate an error The following diagnostic codes are possible 8001 Overrange 8002 Open circuit 8004 Measured value invalid no valid measured value avai lable e g because the channel was not configured 8010 Configuration invalid 8020 I O supply voltage faulty 8040 Module faulty 8080 Under range Measured value representation in IB IL format 15 bits 15 14 43 12 44 10 9 8 7 6 5 4 3 2 1 0 SB Analog value SB Sign bit 9499 040 67911 17 VARIO AI 8 SF Significant Measured Values Voltage Ranges 8001 OR gt 5 419 gt 10 837 gt 27 093 gt 54 187 7F00 32512 5 419 10 837 27 093 54 187 7530 30000 5 0 10 0 25 0 50 0 0001 1 166 67 uV 333 33 UV 833 33 UV 1 6667 mV 0000 0 0 0 0 0 0000 0 lt 0 lt 0 lt 0 lt 0 8001 OR gt 5 419 gt 10 837 gt 27 093 7 00 32512 5 419 10 837 27 093 7530 30000 5 0 10 0 25 0 0001 1 166 67 uV 333 33 UV 833 33 UV 0000 0 0 0 0 FFFF 0 166 67 uV 333 33 uV 833 33 uV 8ADO 30000 5 0 10 0 25 0 8100 32512 5 419 10 837 27 093 8080 UR 5 419 10 837 27 093 9499 040 67911 VARIO AI 8 SF Current Ranges
28. o process data output words The word OUT O the Inline station the message contains the command and the word OUT 1 Measured value invalid diagnostic contains the parameters for this command code 8004 appears in the process data input words for every channel The following configurations are possible scanned The message is displayed Selecting a measuring range according to until the appropriate channel has the input signal been configured Selecting the mean value generation filte If the configuration is changed the ring message Measured value invalid Changing the formats for the representation diagnostic code 80044 appears for of measured values a maximum of 100 ms Current or voltage measurement is selected by applying the measured si 3 Please note the extended runtime gnal to the current or voltage input when a channel is configured for the and then configuring the measuring first time and every time a channel is range reconfigured OUT 0 OUT 1 53088 l Reserved 0000 00 Filter Format Measuring range Reserved 0 Reserved 0 Command Reserved 0000 0000 6226A007 Figure 6 Process data output words MSB Most significant bit LSB Least significant bit 3 Set all reserved bits to O 8 9499 040 67911 VARIO AI 8 SF OUT 0 Command Code Bit Assignment OUT O 15 0 14 13 12 11 Bit 15 to bit 8 command
29. plies is not Common Potentials parate potential area The 24 V main power supply 24 V segment voltage and GND have the same potential FE is a se Terminal Separate Potentials the System Consisting of Bus Terminal Power Terminal and an I O Test Distance Test Voltage 5 V supply incoming remote bus 7 5 V supply bus logic 500 V AC 50 Hz 1 min 5 V supply outgoing remote bus 7 5 V supply bus logic 500 V AC 50 Hz 1 min 7 5 V supply bus logic 24 V supply 500 V AC 50 Hz 1 min 7 5 V supply bus logic 24 V supply Uana functional earth ground 500 V AC 50 Hz 1 min l Os functional earth ground 500 V AC 50 Hz 1 min Failure of the voltage supply Uana Yes I O error user error Yes error message via the process data input words see page 30 9499 040 67911 VARIO AI 8 SF Ordering Data Terminal with eight analog input channels VARIO AI 8 SF KSVC 103 00141 PMA Prozess und Maschinen Automation GmbH Miramstrasse 87 34123 Kassel Germany 49 0 561 505 1307 GH 49 0 561 505 1710 mL www pma online de ri 46 9499 040 67911 Technical modifications reserved
30. possible to detect precisely which channel supplied the measured value The standard methods enable more accurate error diagnostics than the special methods If you switch the group command for reading the channels e g between 700044 and 7100 when reading two groups of four channels each you must allow sufficient time to do so It must be ensured that the received measured values belong to the requested group This can only be ensured using waiting times 9499 040 67911 37 VARIO AI 8 SF Application Notes Notes on typical applications are provided here in order to facilitate optimal use of the VARIO AI 8 SF terminal in different operating modes Precision DC Measurements Precision DC measurements constitute an opti mal area of application for the VARIO AI 8 SF terminal The high resolution analog to digital converter and excellent instrumentation ampli fier technology achieve a very high level of accu racy typically 0 0296 in the voltage range In order to take full advantage of these features the following configurations are recommended Measured value acquisition according to standard method 1 or 2 Format IB IL high resolution Filtering 32 sample average This suppresses undesirable interference sig nals and provides a low noise accurate measu red result Non time critical i e slow proces ses are a prerequisite for this configuration Closed Loop Control Tasks The VARIO
31. s data output words is as follows OUT O Bit Assignment bin hex Bit Assignment bin hex With the command OUT 0 the configuration according to OUT 1 is sent to the electronics module After configuration is complete the command and the configuration are mirrored in the process data input words 9499 040 67911 31 VARIO AI 8 SF Configure terminal OUT 0 6000 OUT 1 0301 nex Configuration completed successfully IN 0 60005 IN 1 030156 Error during configuration IN O FOOOhex IN 1 03015 A cyclic program sequence which reads the measured values of the individual channels takes place after configuration has been successfully completed The appearance of the process data output word OUT O0 is as follows OUT 0 Bit 7 6 5 3 2 0 Assignment 0 bin 0 0 0 0 0x00 command does not require any parameters and the value of the parameter word OUT 1 is 00004 With the command in OUT O the read request is sent to the electronics module After the command has been executed it is mirrored the process data input word IN 0 and the analog value or a diagnostic message is displayed in the process data input word IN 1 Read measured value for channel 1 OUT 0 0000hex OU
32. suring range 0 V to 50V 5 V 4 mA to 20 mA 0110 0011 bins 10106 10 Procedure 1 Install the terminal 2 Connect the voltage power up 3 Configure each individual channel in the terminal in turn initialization phase e g in the initialization phase of the application program 4 Read the measured value for each channel in turn Initialization phase The appearance of the process data output word OUT O is as follows for all channels OUT 0 Bit 71615 4 131211 0 Assignment 0 bin 0 0 0 0 The process data output word OUT 1 indicates the parameters for each channel according to the task For channel 1 it looks like this OUT 1 Bit 15 14 13 12 11 Assignment 1 0 bin 1 0 0 34 9499 040 67911 VARIO AI 8 SF With the command in OUT 0 the configuration according to OUT 1 is sent to the electronics module for each channel After configuration of a channel is complete the command and the configuration are mirrored in the process data input words Configure channel 1 OUT O 4000 Configuration completed successfully 01 4000 Error during configuration IN O Configure channel 2 OUT 0 41005 Configuration completed successfully 4100hex Error d
33. uring configuration IN O C100hex Configure channel 3 OUT O 4200hex Configuration completed successfully 4200 Error during configuration IN O C200hex OUT 1 IN 1 IN 1 OUTI1 IN 1 IN 1 OUT 1 IN 1 IN 1 Configure channels 4 to 8 according to the example configurations shown 0106 0106 0106 0003 0003 0003 020Ahex 020Ahex 020Ahex A cyclic program sequence which reads the measured values of the individual channels takes place after the configuration for each individual channel has been completed successfully The appearance of the process data output word OUT 0 is as follows OUT 0 Bit 7 413121110 Assignment 0 bin 0 0 0 0 0 0 00 command does not require any parameters and the value of the parameter word OUT 1 is 0000 With the command in OUT O the read request is sent to the electronics module After the command has been executed it is mirrored the process data input word IN 0 and the analog value or a diagnostic message is displayed in the process data input word IN 1 The appearance of the process data input and output words is the same as in example 1 9499 040 67911 35 VARIO AI 8 SF Configure channel n 4x00 xxxx RUMP nex Initialization of each individual channel Cyc
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