Modbus functions
FP Web-Server V2.810 EN 161
Any Modbus RTU master connected to the 9-pin RS232C of the FP
Web-Server can access a remote Modbus-TCP server. This gateway
routes all Modbus RTU function requests to the Modbus-TCP server.
Optionally the Modbus RTU master can address different Modbus-TCP
servers (IP address and/or unit ID is calculated by the accessed RTU
slave address) or the local PLC directly.
The Modbus-TCP communication can also be done via modem.
Features:
This function uses the configurable Modbus-to-PLC address translation
table.
The gateway routes all Modbus function requests.
The Modbus-TCP client can also handle UDP broadcast messages (all
responses from the servers are ignored).
An integrated setup wizard helps you to configure the Modbus-TCP
client.
NumberMaxOfClientTransactions = 6 (if all are busy, then the oldest is
disconnected).
SO-RCVBUF, SO-SNDBUF = 4kB with TCP and 2kB with UDP (other IP
Stack parameters can be defined).
Further information:
For more information on Modbus-TCP client settings and the respective
client functions, please refer to the online help under the keyword
"Modbus-TCP client settings".
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