Behavior in case of network failure

You can use bit 8000:0n (Safe State Active) to specify whether channel n should assume a certain value (Safe State Value) when data transmission is interrupted.

With bit 8001:0n (Safe State Value) you define this value for channel n.

Behavior in case of network failure 1:

Safe State Value during network start-up

The network transmits output process data only in the network states Save-Operational (SAFE-OP) and Operational (OP). Also at the network states INIT, Pre-Operational (PRE-OP) and BOOT passed through during network start-up no output process data is transmitted. If Safe State is activated for an output, this output also adopts the specified value during network start-up.

8000:0 - DIG Safe state active Ch.1

Behavior in case of network failure 2:

Observe the maximum short-circuit current!

When dimensioning the power supply unit and choosing the fuses, observe that the short-circuit current is approximately 1.7 A.

Behavior in case of network failure 3:

8000:01 to 8000:08 - DIG Safe state active Ch.1, Output 1 to Output 8 (default: TRUE)

Specifies whether or not the outputs should adopt a safe state in the case of a network failure.

Value

Meaning

FALSE

Safe state disabled

TRUE

Safe state enabled

8001:01 to 8001:08 - DIG Safe state value Ch.1, Output 1 to Output 8 (default: FALSE)

Specifies what the safe state is.

Value

Meaning

FALSE

Output switched off

TRUE

Output switched on