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8
GFK-2731 Chapter 8 Errors: Messages and removal 8-5
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.
8.2 Supply voltage errors
Acknowledgment: Yes (1) Acknowledging the diagnostic message deletes the message and activates the outputs.
Undervoltage at U
M
: Supply voltage U
M
is measured. If U
M
< 17 V, a diagnostic message is generated.
8.3 General errors
Acknowledgment: Yes (1) Acknowledging the diagnostic message deletes the message.
Acknowledgment: Yes (2) Acknowledging the diagnostic message deletes the message and enables the outputs.
WARNING: Unexpected machine startup
An operator acknowledgment leads to a positive edge and can thus result in the outputs
being re-enabled.
Table 8-5 Supply voltage U
M
errors
Error cause Diagnos-
tic code
(hex)
LED Remark Effect Remedy Acknow-
ledgment
Undervoltage
U
M
X1F0 UM
flashing
U
M
below the
permissible voltage
range
All module outputs
are in the safe state
Check supply
voltage level and
correct
Check supply line
length and load
Yes (1)
Table 8-6 General errors
Error cause Diagnos-
tic code
(hex)
LED Remark Effect Remedy Acknow-
ledgment
Device
temperature
at critical
value
X1F2 Immediate
shutdown. Further
temperature
increase causes the
module to switch to
the safe state.
Check and adapt:
–
Ambient
conditions
– Derating
– Output loads
– Switching
frequency
Yes (1)
Hardware
fault
FS ON Error in the logic
area
Module is in the safe
state
Replacement
Impermissible DIP
switch position
Module is in the safe
state
Check and correct
switch position