SETUP
DOC_DEV_XS_Setup guide_C
page 57
16.2.5
Modbus server gateway
This gateway allows to connect serial modbus slaves to the serial
interface of the product.
Up to 32 slaves, can be connected to the RS485 port.
How the Modbus server Gateway works :
A Modbus TCP client send a Modbus TCP client to the gateway.
The gateway behave as a master on the serial link. It transcode and transmit the request on the serial link.
The Modbus slave address of the request is :
•
Either the address contained in the Modbus TCP address field ; in this case, several slaves can be
addressed on the serial link.
•
Or a fixed address configured in the gateway (see below); in this case, only one slave can be addressed
on the serial link.
Warning :
Several TCP Modbus client can send requests to the slaves on the serial link. Nevertheless, care
must be taken not to saturate the serial link since its flow rate is much lower than the Ethernet one.
To configure the gateway :
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