Output serial data on inport change
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Feb 15 2012, 10:05 AM
Joined: 15-February 12
Member No.: 13,667
I am struggling with a rather simple task. Here is the problem:
I would like my M3 CD12 to send the inport status out on the serial port every time the status of the inport changes. I know that you can send a read command to the M3 and then receive the inport status but I don't want to use that kind of polling method.
Does somebody know how to achive this behavior?
The reason why I need it is because I have an application that needs to react on changes and I don't want to do a lot of work on unnecessary polling.
Any help would be really appreciated.
Feb 15 2012, 01:42 PM
Group: Authorized Member
Joined: 26-June 09
Member No.: 6,956
In any type of communication available for the Millenium 3 (Serial Link, Modbus RS-485, Modbus TCP/IP) the controller cannot start the communication. The other device connected to the Millenium has to be a Master/Client and poll from the controller.
Being this said, polling is completely necessary if you want to read information from a Millenium controller.
Time is now: 17th September 2014 - 06:37 PM