Diagnostics Alarms - Siemens SIMATIC ET 200SP Manual

Interrupts/diagnostics alarms

5.3 Diagnostics alarms

5.3 Diagnostics alarms
Diagnostics alarms
A diagnostics alarm is output for each diagnostics event and the LED DIAG flashes on the
module. Diagnostics alarms can, for example, be read from the diagnostics buffer of the
CPU. You can evaluate the fault codes with the user program.
Table 5- 5 Diagnostics alarms, meaning and corrective measures
Diagnostics alarm
Short-circuit (NAMUR
changeover contact and
NAMUR sensor only)
Tip: Check the normally
open and normally
closed contact channels
of the NAMUR
changeover contact.
Wire break (only NAMUR
changeover contact,
NAMUR sensor, sensor
connected with 10 kΩ
and single contact
connected with 10 kΩ)
Tip: Check the normally
open and normally
closed contact channels
of the NAMUR
changeover contact
Fault
No load voltage
External fault
(changeover sensors
only)
Fault 1 in
actuator/sensor = signal
chatters
Channel/component
temporarily unavailable
24
Fault code Meaning
1 Short-circuit in the signal line to the sensor
H
Sensor defective
Wrong sensor type configured
Load impedance too low
6 Signal line to a sensor interrupted
H
Sensor defective
Wrong sensor type configured
Load impedance too high
Channel not connected (open)
9 Sensor supply defective
H
Hardware failure
11 Supply voltage L+ missing or too low
H
1A Changeover error:
H
Validity check between normally closed and
normally open contact channel negative
1D Chatter error:
H
Signal chatters: too many signal changes
within the monitoring window
If no further chattering of the input signal is
detected within three monitoring windows,
an outgoing diagnostics alarm is triggered.
The status of the value of the current signal
in the process image is set to "valid".
1F Firmware update is currently in progress or
H
was canceled while running
Remedy
Correct the process wiring
Replace the sensor
Correct the parameter assignment
Use a sensor with a higher
impedance
Correct the process wiring
Replace the sensor
Correct the parameter assignment
Use a different sensor type or
modify the wiring, for example, using
cables with a larger cross-section
Disable diagnostics, connect sensor
contacts
Replace the module
Check supply voltage L+ on the
BaseUnit
Check BaseUnit type
Check process wiring, change
sensor
Verify the chatter monitoring
parameters
Check process wiring, if necessary
change sensor
Connect the supply voltage
Restart the firmware update
DI 8xNAMUR HF digital input module (6ES7131-6TF00-0CA0)
Manual, 02/2014, A5E03894478-01