SETUP
Page 58
DOC_DEV_XS_Setup guide_C
•
In the menu, choose
Setup > IP-RS gateways > Modbus > Modbus server
.
•
Tick the
Enable Modbus server
checkbox.
•
Configure the following parameters.
COM port
Select the serial link 1 or 2 of the product.
Bitrate, Parity, Data, stop bits
Allow to set the bitrate and the format of the asynchronous serial link..
Modbus protocol
Select RTU (hexa) or ASCII.
Enable proxy/cache function
If this function is active, a request is only sent to a slave if the same query has not been sent since the time
set by the “cache refres
h" parameter.
Cache refresh
Sets the minimum time between two identical requests to the same slave.
Inter-character time
Set up the maximum delay the gateway will have to wait between a received character of a Modbus answer packet and
the following character of the same packet.
Modbus slave address
If the value "0" is selected, the gateway uses the Modbus address specified by the Modbus TCP client to address the
Modbus slave on the serial link ; up to 32 slaves can be addressed on the serial link.
If a particular value is selected (1 to 255), the gateway sends all requests to the selected slave ; only one slave can be
addressed on the serial link.
TCP idle Timeout
Set the time the gateway will wait before disconnecting the TCP link if no characters are detected.
Slave response timeout
Set the time the gateway will wait for a response from the slave.
TCP port
Set the port number the gateway has to use. The default Modbus TCP port is 502.
Local reiteration count
Set up the number of times the gateway will repeat a request in case of no response from the slave.
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