Modbus Tcp - ABB SM500F User Manual

SM500F
Field mountable paperless recorder

7.11 Modbus TCP

Modbus TCP enables Modbus TCP devices to communicate via an ethernet network transferring Modbus
messages via TCP/IP. Communication with standard, serially connected, Modbus RTU devices is also
possible through a Modbus TCP Gateway.
The recorder can be configured to act as either a Modbus TCP Server (Slave) or a Modbus TCP Client
(Master) device on a Modbus TCP network.
If configured as a Server, the recorder responds to Modbus queries transferred via the Modbus TCP
protocol for the registers described in Appendix B, page 148. The recorder can be configured for
unrestricted access or access can be restricted to a maximum of 6 Modbus TCP Clients, from defined IP
addresses.
If configured as a Client, the recorder collects data from Modbus TCP Servers (or RTUs via a gateway) into
its 24 Comms Analog and 24 Comms Digital Channels. Each analog and digital input can be individually
configured to any register within any slave device. The configuration allows for receipt of data in most
commonly used data formats
IM/SM500F Rev. Z
Select the required Modbus TCP configuration.
Disabled
Modbus TCP Server – recorder acts as a Modbus Slave
Modbus TCP Client – recorder acts as a Modbus Master
Note. Displayed only if 'Implementation'
Select the maximum number of simultaneous TCP/IP connections
permitted – min. 1, max. 9.
Note. Displayed only if 'Implementation'
Set the TCP/IP port-through used by the Modbus TCP network –
normally port 502.
Note. Displayed only if 'Implementation' is set to 'Modbus TCP Server'.
All analog data is read from the recorder in IEEE format contained in
adjacent registers representing the data in high word, low word order.
Select 'Yes' to reverse the IEEE data, otherwise select 'No'.
– Modbus TCP disabled.
is not
is not
7 Configuration
set to 'Disabled'.
set to 'Disabled'.
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