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Outputs
Serious errors
GFK-2731
2.8.3
Device errors
If a hardware fault in the internal circuit is detected at an output, all module outputs are
disabled ("0" = OFF = safe state).
The relevant diagnostic message is transmitted to the controller (see "Safe digital output
errors" on page 8-4).
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
–
Faulty supply voltage
–
Impermissible switch position, DIP switches
The relevant diagnostic message is transmitted to the controller (see "Errors: Messages
and removal" on page 8-1).
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.
2.8.4
Parameterization errors
Parameterization errors are indicated:
–
As long as the module is not parameterized
or
–
In the event of faulty parameterization
Parameterization errors cause the entire module to enter the safe state. The FS LED on
the safety module flashes.
In the event of faulty parameterization, the relevant diagnostic message is transmitted to
the controller (see "Parameterization errors" on page 8-6).
Exception:
If an output is operated in stop category 1 and this output is within the switch-off delay
time, then another instance of faulty parameterization results in the entire module
switching to the safe state only once the switch-off delay time has elapsed.
Chapter 2 Product description
2
2-9
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