QUESTION:

A start ""button"" can be parameterized to the safety monitor.
Must this signal always be cable wired or is it possible to use a signal of the plc also?

ANSWER:

The start button of the safety monitor can also be a plc output (pnp or relay). In this case, the power supply for plc and monitor must be the same DC power supply.

It is also possible to start the monitor via AS-Interface input. In that case you program the start device ""Monitored Start - standard slave"" and choose an AS-Interface input with a start button. Then you can start the monitor with this button.

The hardware wiring can be saved in the following way: An output of a ""Standard Slave"" can be parameterized to start the monitor. A not used AS-Interface output can be choosing for this. This output can also exist only virtually, e.g. if a 4-input module is used the module itself occupies 4 Input and 4 output bits. One of this outputs (which do not exists in hardware) can be used to give the start signal for the monitor.

Attention:
- For the monitored start with ""Standard Slave"" the module must be physically available. The plc wouldn’t stop, if output is programmed, but the monitor doesn’t progress the signal, because it cannot find the slave.
- The start time must be an impulse of 50 ms till 2 s.