11 Modbus Communication Register
11.1 Address of Modbus Registers
The registers are numbered in accordance with the Modbus
standard. These are “HOLDINGS REGISTER” on the range of reg‐
isters from 40001 to 49999.
Some software and Modbus controllers use an address from 0 to
65535.
Modbus register 40001 therefore corresponds to Modbus address
0, register 40002 corresponds to address 1 and so on and so forth.
Modbus
register
Number
of regis‐
ters
Name Access Format Description
Interfaces
41001 2 signal_RI1 r REAL Signal on RI RI1 input [Ohm]
41003 2 signal_RI2 r REAL Signal on RI RI2 input [Ohm]
41005 2 signal_AI1 r REAL Current on input AI1 [mA]
41007 2 signal_AI2 r REAL Current on input AI2 [mA]
41009 2 signal_SI1 r REAL Conductivity on input SI [µS]
41011 2 signal_SI2 r REAL Temperature on input SI [°C]
41013 2 signal_K1 r REAL Signal on DIx input [Depends switch
config]
41015 2 signal_K2 r REAL Signal on DIx input [Depends switch
config]
41017 2 signal_MI1 r REAL Signal on MI1 input [Depends on module]
41019 2 signal_MI2 r REAL Signal on MI2 input [Depends on module]
41031 1 signal_DI1 r BOOL 0=OPEN / 1=CLOSE
41032 1 signal_DI2 r BOOL 0=OPEN / 1=CLOSE
41033 1 signal_DI3 r BOOL 0=OPEN / 1=CLOSE
41034 1 signal_DI4 r BOOL 0=OPEN / 1=CLOSE
41035 1 signal_DI5 r BOOL 0=OPEN / 1=CLOSE
41036 1 signal_DIS r BOOL 0=OPEN / 1=CLOSE (on input SI)
41041 1 state_PO1 r BOOL 0=OPEN / 1=CLOSE
41042 1 state_FO1 r BOOL 0=OPEN / 1=CLOSE
41043 1 state_FO2 r BOOL 0=OPEN / 1=CLOSE
41044 1 state_FO3 r BOOL 0=OPEN / 1=CLOSE
41045 1 state_FO4 r BOOL 0=OPEN / 1=CLOSE
41046 1 state_RO1 r BOOL 0=OPEN / 1=CLOSE
41056 2 signal_AO1 r REAL Signal on AO1 output [mA]
41058 2 signal_AO2 r REAL Signal on AO2 output [mA]
41076 1 state_HI1 r BOOL 0=Out of range / 1=In range (Schedule
Biocid A summer)
Modbus Communication Register
79
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