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Operation through MODBUS RTU
Incorporation in the field
bus configuration
To configure the higher-level MODBUS RTU master, perform
the following steps.
X
Include a function block for a MODBUS RTU master in the
configuration of the used PLC.
X
Assign the communications port to be used for MODBUS
RTU communications to this function block.
X
In the MODBUS RTU function block make the required
MODBUS network settings, in particular the MODBUS RTU
gateway settings (baud rate, parity stop bits and address).
X
Specify the size of the register areas for the MODBUS
network, taking into account the data to be transferred.
The MODBUS gateway SWIRE-GW-MB has a built-in
adjustable watchdog timer (see section "Setting the
watchdog timer", page 43), which triggers a fault state in
the gateway if MODBUS communication fails. To prevent
timeouts, the control data from the SWIRE-GW-MB should
be written periodically.
Содержание SWIRE-GW-MB
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