2
GFK-2734
Chapter 2 Product description
2-13
2.10.3
Device errors
Relay outputs
If a hardware fault in the internal circuit is detected at a relay output,
all
module relay
outputs are disabled ("0" = OFF = safe state).
The relevant diagnostic message is transmitted to the safe controller (see Section "Safe
digital relay output errors" on page 9-3).
Serious errors
All serious errors that can result in the loss of or adversely affect the safety function cause
the entire module to enter the safe state. The FS LED on the safety module is permanently
on.
The following errors result in the safe state:
–
Serious hardware faults in the internal circuit
–
User errors
–
Module overload
–
Module overheating
–
Incorrect supply
The relevant diagnostic message is transmitted to the safe controller (see Section "Errors:
Messages and removal" on page 9-1).
WARNING: Loss of safety function
On a device error in Cat.2 applications (single-channel), it is not always possible to enter
the safe state.
In the event of a device error, the following measures should be taken:
Disconnect the module from the power supply and replace it.
WARNING: Loss of the safety function due to sequential errors
In the event of a device error, the following measures should be taken to prevent
sequential errors:
Disconnect the module from the power supply and replace it.