Interrupts; Diagnostic Messages - Siemens SIMATIC ET 200SP Manual

5.2

Interrupts

The DI 16×24VDC ST digital input module supports diagnostic interrupts.
Diagnostics interrupts
The module generates a diagnostic interrupt at the following events:
● Wire break
● Parameter assignment error
● Supply voltage missing
5.3

Diagnostic messages

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 corrective measures
Diagnostics alarm Error code
Wire break 6
H
Parameter assign- 10
ment error
Supply voltage miss- 11
ing
Digital input module DI 16x24VDC ST (6ES7131-6BH01-0BA0)
Manual, 09/2017, A5E03573442-AF
Meaning
Impedance of encoder circuit too high.
Wire break between the module and sen-
sor
Channel not connected (open)
The module cannot evaluate parame-
•
H
ters for the channel.
Incorrect parameter assignment.
•
Missing or insufficient supply voltage L+
H
Interrupts/diagnostic alarms
Solution
Use a different encoder type or modify
the wiring, for example, use cables with
larger cross-section
Connect the cable
Disable diagnostics
•
Connect a resistor of between 25 and
•
45 kOhms to the encoder contacts
Correct the parameter assignment
Check supply voltage L+ on the Ba-
•
seUnit
Check BaseUnit type
•
5.2 Interrupts
23