PM856, How is data from the MBWrite function block handled in Modbus master?
How is data from the MBWrite function block handled in Modbus master? I use MBWrite function blocks to send setpoint to external controller (slave). Is the only changed value sent to the slave or is it also sent unchanged value to the slave each time "Req" input becomes active?
Best regards
/Vladimir
Best regards
/Vladimir
Asked 3 months ago
Answers
0
Hi,
The Req parameter activates a write operation when true (front) = each time when positive front at Req input.
The Done parameter becomes true when data are sent
The Req parameter activates a write operation when true (front) = each time when positive front at Req input.
The Done parameter becomes true when data are sent
Source: CBM Help
0
The entire message gets sent when you trigger the sendreq pin of the MBWrite block.
Answered 3 months ago
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