Diagnostics Alarms - Siemens ET 200SP Manual

5.3

Diagnostics alarms

A diagnostics alarm is generated and the DIAG-LED flashes on the module for each
diagnostics event. You can read out the diagnostics alarms, for example, in the diagnostics
buffer of the CPU. You can evaluate the error codes with the user program.
Table 5- 4 Diagnostics alarms, their meaning and how to deal with them
Diagnostics alarm
Short-circuit (current)*
Short-circuit (1 to 5 V)
**
Wire break (current) **
High limit violated
Low limit violated
Error
Parameter assignment
error
Supply voltage missing
Channel temporarily
unavailable
Short-circuit of the encoder supply to ground and/or of the input signal to the encoder supply of a channel can have a
*
temporary effect on other channels (duration < 0.5 s). This means the short-circuit diagnostics can also be reported for
unaffected channels and/or the measured value can be affected temporarily.
** In case of activated smoothing the module calculates the measured values across several module cycles. The module
only generates the short circuit or wire break diagnosis if the smoothed measured value is stable. After the short-circuit
or wire break has been eliminated, the module supplies stable measured values again depending on the set smoothing
level.
Analog Input Module AI 4xU/I 2-wire ST (6ES7134-6HD01-0BA1)
Manual, 12/2017, A5E03572832-AD
Error code Meaning
1 Sensor supply to ground
H
Input to sensor supply
1 Short-circuit of input signal
H
Open input
6 Impedance of encoder circuit too high.
H
Wire break between the module and sen-
sor
Channel not connected (open)
7 Value is above the overrange.
H
8 Value is below the underrange.
H
9 Internal module error occurred.
H
10
The module cannot evaluate parame-
•
H
ters for the channel.
Incorrect parameter assignment.
•
11 No or insufficient supply voltage L+
H
1F Firmware update in progress or update has
H
been canceled.
The module does not read any process
values in this state.
Interrupts/diagnostics alarms
5.3 Diagnostics alarms
Solution
Correct the module/encoder tuning
Correct the module/encoder tuning
Connect input
Use a different encoder type or modify
the wiring, for example, using cables
with a larger cross-section
Connect the cable
Disable diagnostics
•
Connect the sensor contacts
•
Correct the module/encoder tuning
Correct the module/encoder tuning
Replace module
Correct the parameter assignment
Check supply voltage L+ on the
•
BaseUnit
Check BaseUnit type
•
Wait for firmware update.
•
Restart the firmware update.
•
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