Siemens SIMATIC ET 200AL System Manual page 982

Interrupts/diagnostic messages/diagnostics
6.5 Fault types, causes, and corrective measures
Event ID Diagnostic
message
16x0313 Failure in the
input circuit
16x031C Input shorted to P F-DI 4/F-DQ 2
16x031E Read back failure
16x0320 Overload
16x0321 Supply or load
voltage too high
16x0322 Supply or load
voltage too low
Once the fault is eliminated, reintegrate the fail-safe module (return to normal state) from passivation into the safety
1
program.
76
F-DI 4/F-DQ 2 Description
Fail-Safe
module
F-DI 4/F-DQ 2 Internal fault at the
digital inputs read circuit/test circuit
Input shorted to P
digital inputs failure
F-DI 4/F-DQ 2 The module has de-
digital outputs tected a channel prob-
lem where the
expected terminal
voltage(s) are not
reached
F-DI 4/F-DQ 2 Overload condition at
digital outputs the output driver that
leads to passivation of
the channel
Module Supply voltage (1L+) or
load voltage (2L+)
maximum exceeded
Module Supply voltage (1L+) or
load voltage (2L+)
minimum exceeded
Digital I/O module F-DI 4+F-DQ 2x24VDC/2A, 4xM12 (6ES7146-5FF00-0BA0)
Possible causes Corrective measures
• The module digital •
inputs detect a
failure during bit
pattern testing of
inputs
• EMI or module •
hardware fault
• External wiring or •
sensor shorts input
signal to L+
•
• Input configured
for internal sensor
•
supply with short-
circuit detection
enabled, but wired
to external L+
• Input defective
• "Maximum read- •
back time" or "Max-
imum readback
•
time switch on
test" configured
value is too small
• Output switch
failure
Overload at output Eliminate overload
Supply or load voltage Adjust supply or load
is set too high voltage
Supply or load voltage Adjust supply or load
is set too low voltage
Equipment Manual, V1.0, 05/2021, A5E51082342-AA
1
If intermittent, it is
probably due to in-
terference; elimi-
nate the
interference
If persistent, or
repeats after ef-
forts to eliminate
interference, re-
place the fail-safe
module
Check/correct ex-
ternal short-circuit
Make wiring and
configuration agree
Replace the fail-
safe module
Increase readback
time
Replace the fail-
safe module if out-
put does not re-
spond