Diagnostics Alarms - Siemens SIMATIC ET 200SP Manual

6.3

Diagnostics alarms

A diagnostic message is generated and the DIAG-LED flashes red 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 6- 5 Diagnostics alarms, their meaning and corrective measures
Diagnostics alarm
Short-circuit (encoder
supply)
Short-circuit (1 to 5 V)
Wire break (current 4 to
20 mA)
High limit violated
Low limit violated
Error
Parameter assignment
error
Supply voltage missing
Hardware interrupt lost 16
Channel temporarily
unavailable
Diagnostic messages in the measured value of analog input modules
Each analog input module supplies the measured value 7FFF
parameter assignment when an error is detected (with configuration SCALE: 7F800000
FF800000
Analog input module AI 2xU/I 2-/4-wire HF (6ES7134-6HB00-0CA1)
Equipment Manual, 05/21, A5E51055079-AA
Error code Meaning
1 Short-circuit encoder supply to ground
H
1 Short-circuit of input signal
H
Open input
6 Impedance of encoder circuit too high
H
Wire break between the module and sensor Connect the cable
Channel not connected (open)
7 Value is above the overrange
H
8 Value is below the underrange
H
9 Internal module fault has occurred (diag-
H
nostic message applies to the entire mod-
ule)
10 The module cannot evaluate parameters
H
for the channel
Incorrect parameter assignment
11 Missing or insufficient supply voltage L+
H
Error is reported when a hardware inter-
H
rupt (high/low limit) could not be reported.
1F Firmware update is currently in progress or
H
has been canceled. The module does not
read in process values in this state.
The channel is currently being calibrated.
).
H
Interrupts/diagnostics alarms
6.3 Diagnostics alarms
Solution
Correct interplay between module and
encoder
Correct interplay between module and
encoder
Connect input
Use a different encoder type or modify
the wiring, e.g. use cables with larger
cross-section
• Disable diagnostics
• Connect the encoder contacts
Correct interplay between module and
encoder
Correct interplay between module and
encoder
Replace module
• Correct the parameter assignment
• Check the supply voltage L+ on the
BaseUnit
• Check BaseUnit type
• Limits might be assigned twice
• If necessary, reduce the bus cycle
• If necessary, use higher SFU
• Wait for firmware update
• Restart the firmware update
Complete calibration
or 8000 depending on the
H H
or
H
45