Is it possible to define a minimum delay between two Modbus requests?

FAQ #101423

In some cases (if the Modbus server is rather slow) a minimum delay between two Modbus requests (which are sent by the Modbus client) is to be respected (e.g. if the server needs some time to correctly prepare its next response).

If the Modbus client (or master) doesn't respect this minimum delay time the Modbus server (or slave) can't treat all requests which will lead to communication errors.

 

 

 

 

How to define a minimum delay between two Modbus requests?
In PG5 1.4.300 (or higher) with version 1.0.17 (or higher) of the SBC Modbus FBox library it is possible to delay the request sent by a ModBus client to a Modbus server each time the request is sent.
The same function is available for PG5 2.0.110 (or higher) with the version 2.6.101 (or higher) of the SBC Modbus FBox library.

You can configure this Minimum Request Delay parameter either in the Init Client TCP extended FBox or in the Init Client RS extended FBox.

 

Categories

Communication

PG5 2.0 / Modbus

Last update: 27.05.2015 12:41

First release: 11.05.2010 12:44

Views: 3216

The requested software / document is no longer marketed by Saia-Burgess Controls AG and without technical support. It is an older software version which can be operated only on certain now no longer commercially available products.

Download