ABB ControlMaster CM10 Communications Supplement page 12

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators,
...Communication
MODBUS TCP
Setup
Implementation
Port
Connections
Client Authority
Client 1 (to 3) IP
10
1
/
Note. After changing any of the TCP parameters it is advisable to power-cycle the instrument to
ensure changes are applied.
Select the MODBUS TCP operation mode:

Off – MODBUS TCP disabled

Server – instrument acts as a MODBUS slave
Displays the TCP/IP port used by the MODBUS TCP network (fixed at 502).
Select the maximum number of simultaneous TCP/IP connections permitted – minimum 1,
maximum 3.
Select the number of authorized TCP/IP connections permitted:
Selected from:

Unrestricted – any MODBUS TCP client device is permitted to poll the instrument

1 (to 3) – Only the MODBUS TCP client device whose IP address is entered in the
authorized Client 1 (to 3) IP parameter (below) is permitted to poll the instrument.
Enter the IP address(es) of the MODBUS TCP Client (MODBUS Master) device(s) permitted to poll
the instrument for data.
Note. Displayed only if the Client Authority parameter (above) is not set to Unrestricted.
1 1
, / and / DIN
8 4 2
4 Communication Level
IM/CM/C–EN