Instruction Manual

Manual MCS-64: Modbus on Ethernet
Page 15
5.1 System diagnosis – ID, IV, IS
Read these registers to get type, firmware version or device status of System MCS-64.
ID Request of device identity [ Register = 202C, Type = Int32 ]
Master (PC / PLC) sends Device responds
ID D:8813
The response to this request gives the actual identity of the active device. This is particularly
useful when trying to identify different device types on a bus.
IV Request of firmware version [ Register = 202E, Type = Int32 ]
Master (PC / PLC) sends Device responds
IV V:0124
The response to this request gives the firmware version of the active device.
IS Request device status [ Register = 2030, Type = Int32 ]
Master (PC / PLC) sends Device responds
IS S:240000 (example)
The response to this request comprises of two 3-digit decimal values, which can be decoded
according to the table below:
Leftmost 3-digit value: Rightmost 3-digit value:
1 Signal stable 1 (not used)
2 Zero action performed 2 (not used)
4 Tare active 4 (not used)
8 (not used) 4 (not used)
16 Setpoint 0 active 4 (not used)
32 Setpoint 1 active 4 (not used)
64 Setpoint 2 active 4 (not used)
128 Setpoint 3 active 4 (not used)
The example decodes the result S:067000 as follows: Signal stable (no-motion): 1
Zero action: 2
Setpoint 2 active: 64
Total 67
Note: the unused bits are set to zero.