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Cooper Bussmann 915U-2 Wireless Mesh I/O and Gateway User Manual
97
Rev Version 1.2.2
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C - ExpaNSION I/O rEGISTErS
Adding expansion I/O modules to the 915U-2 will automatically add the I/O from the 115S modules to the internal
915U-2 I/O store. To calculate the register location in the I/O store, find the address of the I/O point in the tables in
this appendix, and then add the offset. The offset is the Modbus address, multiplied by 20.
Examples:
• Digital input #1 on an 115S-11 with address 5 would be: (5x20) +10001 = 10101
• Digital output #2 on an 115S-11 with address 6 would be: (6x20) +2 = 122
• Analog input #3 on an 115S-12 with address 3 would be: (3x20) +30003 = 30063.
• Analog output #8 on an 115S-13 with address # 7 would be: (7x20) + 40007 = 40147
I/O Store for 115S-11 Expansion I/O Modules
I/O Store
Description
0001 + Offset
0016 + Offset
DIO outputs 1–16
10001 + Offset
10016 + Offset
DIO inputs 1–16
10019 + Offset
Modbus Comms Fail indication for this 115S module
10020 + Offset
Modbus Comms Fail indication (inverse) for this 115S module
30001 + Offset
30004 + Offset
115S-11 pulsed input rate 1–4
30005 + Offset
30012 + Offset
115S-11 pulsed input count
30017 + Offset
Modbus Error counter for this 115S module
30018 + Offset
Modbus Last Error code for this 115S module (see “Expansion I/O Error Registers” on page 81.)
30019 + Offset
Modbus Lost Link counter for this 115S module
30020 + Offset
Module type (0x0101) = 257 / error status
40009 + Offset
40016 + Offset
Pulsed output target 1–8 (1 register per pulsed output)
I/O Store for 115S-12 Expansion I/O Modules
I/O Store
Description
0001 + Offset
0008 + Offset
DIO outputs 1–8
10001 + Offset
10008 + Offset
DIO Inputs 1–8
10019 + Offset
Modbus Error indication for 115S module
10020 + Offset
Detected indication for this 115S module
30001 + Offset
30008 + Offset
Inputs AIN 1–AIN 8
30017 + Offset
Modbus Error counter for this 115S module
30018 + Offset
Modbus Last Error code for this 115S module (see “Expansion I/O Error Registers” on page 81)
30019 + Offset
Modbus Lost Link counter for this 115S module
30020 + Offset
Module type (0x0201) = 513 / error status
40009 + Offset
40016 + Offset
Pulsed output target 1–8 (1 register per output)