5-20
IM MW100-01E
5.2 Main Module Specifications
Modbus Client Function (/M1 option)
Communication possible with Modbus/TCP protocol
Communication media: Ethernet 10BASE-T/100BASE-TX
Communication interval: You can select the following:
100, 200, 250, or 500 ms, or 1, 2, 5, or 10 s
Depending on the performance of the main unit, data
reading and writing may not be able to be performed at
the set communication interval resulting in data loss. If this
occurs, the communication input channel holds the previous
value. In this case, you must lengthen the communication
interval, or reduce the load on the main unit.
Connection wait time: The connection can be dropped if there is no response from
the server after sending commands.
You can select the connection wait time from the following.
Forever (do not drop connection), 0 to 10 s
Communication recovery wait: The time after which commands are sent following
disconnection after the connection wait time. Selected from
the following: Soon (communication interval), 1-60 s
Connection destination (server): Up to 10 can be set.
Supported function: Same as Modbus master function
Command settings: Up to 100 commands can be set.
Command items: Loading channels: C001 to C300
Writing channels: 001 to 060, A001 to A300, C001 to C300
Server (specifi ed by registered number): 1 to 10
Input registers: Same as Modbus master function
Hold registers: Same as Modbus master function
Type: Same as Modbus master function
Modbus Server Function
Communication possible with Modbus/TCP protocol
Communication media: Ethernet 10BASE-T/100BASE-TX
Port: 502/tcp
Maximum no. of simultaneous connections: 4
Receive timeout: Drops communication connection if packets not received for
30 s (fi xed) or more
Supported function: Same as Modbus slave function. However, there is no
function code 8 (loopback test).
Register assignments: Same as Modbus slave function
Modbus error response: Same as Modbus slave function
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