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Interrupts/diagnostics alarms
5.2 Interrupts
5.2
Interrupts
The DI 8×24VDC ST digital input module supports diagnostic interrupts.
Diagnostics interrupt
The module generates a diagnostics interrupt for the following events:
● Short-circuit
● Wire break
● Parameter assignment error
● No supply voltage
5.3
Diagnostics alarms
A diagnostic 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
Error
code
Short-circuit
1
H
Wire break
6
H
Parameter assign-
10
ment error
No supply voltage
11
22
Meaning
Short-circuit to ground at transducer
supply
Impedance of transducer circuit too
high.
Wire break between the module and
sensor
Channel not connected (open)
The module cannot evaluate
•
H
parameters for the channel.
Incorrect parameter assignment.
•
No or insufficient supply voltage L+
H
Remedy
Correct the process wiring
Use a different transducer type or modify the wir-
ing, for example, use cables with larger cross-
section
Connect the cable
Disable diagnostics
•
Connect a resistor of 25 kiloohms to
•
45 kiloohms to the transducer contacts
Correct the parameter assignment
Check supply voltage L+ on the BaseUnit
•
Check BaseUnit type
•
Digital input module DI 8x24VDC ST (6ES7131-6BF01-0BA0)
Manual, 02/2019, A5E03574157-AF
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