When I triggered "Modbus Slave Channel" ( Trigger = RISING_EDGE ), I would like to know when exchange is completed. How I can get something like "Done flag" for separate "Modbus Slave Channel"?
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This is from 10 years ago, I know. But I have been using
(SLAVE_DEVICE.iChannelIndex = CHANNEL_NUMBER) AND (SLAVE_DEVICE.xDone)
I suppose that it shows xDone for the channel that shows up in the iChannelIndex at the same cycle?
It seems to be working properly for two devices that I have been using it before
But now I have another device and using two write channels, for one register each.
One channel works properly and returns DONE flag
When another channel is triggered, I see that it shows up in iChannelIndex, but flag DONE not received, but no Error for the channel. Also, when i check the register in the device it's evident that data has been transferred.
Is this could happen sometimes with CODESYS, so DONE flag not received? Or this is a problem with a given device? With this certain register
Last edit: edvard-munch 3 hours ago
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
When I triggered "Modbus Slave Channel" ( Trigger = RISING_EDGE ), I would like to know when exchange is completed. How I can get something like "Done flag" for separate "Modbus Slave Channel"?
This is from 10 years ago, I know. But I have been using
(SLAVE_DEVICE.iChannelIndex = CHANNEL_NUMBER) AND (SLAVE_DEVICE.xDone)I suppose that it shows xDone for the channel that shows up in the iChannelIndex at the same cycle?
It seems to be working properly for two devices that I have been using it before
But now I have another device and using two write channels, for one register each.
One channel works properly and returns DONE flag
When another channel is triggered, I see that it shows up in iChannelIndex, but flag DONE not received, but no Error for the channel. Also, when i check the register in the device it's evident that data has been transferred.
Is this could happen sometimes with CODESYS, so DONE flag not received? Or this is a problem with a given device? With this certain register
Last edit: edvard-munch 3 hours ago
I use the basic timing of the messages. And assume the message is transmitted sucsesfully. Of course I check the error bits.
Regards,
Edwin.