PDOs

SendCounter

TxPDOs feature an additional SendCounter variable under the Control menu item.

The output variable is incremented by one whenever a PDO is sent.

ReceiveCounter

RxPDOs feature an additional ReceiveCounter variable under the Status menu item.

The input variable is incremented by one whenever a PDO is received. In this way newly arrived PDO are always logged, even if the data in the PDO are unchanged. The variable nevertheless indicates whether a device still sends data on a regular basis. It is useful to link variable with the PLC and monitor it.