AO Continuity counter

The output channel should cyclically receive its current setpoint from the controller via EtherCAT, see PDO Value.

During the commissioning phase and possibly also during ongoing operation, it may be useful to monitor the regular and timely arrival of the setpoint at the device. For this purpose, the 16-bit counter Output Cycle Counter can be enabled channel by channel in the PDO assignment:

AO Continuity counter 1:Fig.164: Enabling 16-bit counter via PDO assignment 0x1623

The respective PDO is then offered for linking in the variable list:

AO Continuity counter 2:

If enabled, the variable is to be operated cyclically with +1 from the controller.
The channel now monitors the counter; if a change > +1 is observed, the channel increments the error counter in CoE 0x90n0:0F by +1. The overflow in the 16-bit value is taken into account. The error counter must be regularly read from the control via ADS and checked.