AC500-eco Modbus RTU With Automation Builder basic License
Is it possible to program and test AC500-eco as Modbus RTU With Automation Builder basic License or should i get another license?
My problem is that when i enable the "COM_MOD_MAST" block, i do net get neither "Done" Nor "Error" although the block is scanned by the PLC.
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In addition to Flavio's answer, I think you can do it with AB basic. A very simple check is if you can download to the PLC and go OnLine.
Then you have to investigate your COM_MOD_MAST. It should be placed in a POU, connected to the task of the PLC.
Also, in order to have Done and/or ERR, in other words to make COM_MOD_MAST working, you need a pulses on EN input of the block. Each pulse to EN input makes one request only of COM_MOD MAST.
One simple example of the block's usage is the following: