SM500F
Field mountable paperless recorder Appendix B – Modbus TCP/Modbus 485
150 IM/SM500F Rev. Z
B.4 Operating Mode Modbus Coils
Tables B.2 to B.10 detail the contents of each Modbus coil. Each coil is assigned a register that can have
one of two values: 0000 and 0001.
Read Only: 0 = Input OK, 1 = Input Failed
Analog Input Modbus Coil
A1 0001
B1 0002
B2 0005
C1 0003
C2 0006
D1 0004
D2 0007
Table B.2 Analog Input Fail States