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9
GFK-2734 Chapter 9 Errors: Messages and removal 9-3
LED The "LED" column specifies which local diagnostic LEDs indicate the error.
Acknowledgment Errors that must be acknowledged are indicated with "Yes" in the "Acknowledgment"
column. Special conditions for re-enabling an output or the module are specified in
brackets [e.g., Yes (1)] in the "Acknowledgment" column and explained below the relevant
table.
9.1 Safe digital relay output errors
Acknowledge all errors that are present. Only then can the outputs be re-enabled.
Acknowledgment: Yes (1) Acknowledging the diagnostic message deletes the message. The module can only be
restarted following power up and error-free selftest.
Acknowledgment: Yes (2) Acknowledging the diagnostic message deletes the message and enables a restart.
Following successful acknowledgment, the module also expects a positive edge from the
application for the output. For two-channel parameterization, this also applies to the other,
potentially error-free output.
Table 9-3 Safe relay output errors
Error cause Error code
(hex) LED Remark Effect Remedy Acknow-
ledgment
Hardware fault X091 All OUT:
Red ON Detected by internal
tests. It is possible that a
relay output could
not be disabled. Please replace
module/remove
module from
system
immediately. –
Signal error at
alarm input X0Bn OUTy:
Red ON A signal error was
detected at an alarm
input that was
assigned to the
displayed output
during
parameterization.
Possible causes:
– Incorrect static
states
– Absence of
clock pulses
– Incorrect clock
pulses
at the affected alarm
input.
Affected output is in
the safe state
Depending on the
error cause, error-
free outputs are also
disabled and a
diagnostic message
is generated (see
"Example for
disabling error-free
outputs:" on
page 9-4).
Check function of
the monitored
actuator.
Check wiring.
Yes (2)
X0B0: OUT0_Ch1
X0B1: OUT1_Ch1
X0B7: OUT0_Ch2
X0B8: OUT1_Ch2
WARNING: Unexpected machine startup
An operator acknowledgment leads to a positive edge and can thus result in the outputs
being re-enabled.