Diagnostics Alarms - Siemens Simatic ET 200MP Manual

Interrupts/diagnostics alarms

5.3 Diagnostics alarms

5.3 Diagnostics alarms
Diagnostics alarms
A diagnostics alarm is generated and the ERROR-LED flashes for each diagnostics event on
the module. The diagnostics alarms can, for example, be read out in the diagnostics buffer of
the CPU. You can evaluate the error codes with the user program.
If the module is operated distributed with PROFIBUS DP in an ET 200MP system, you have
the option to read out diagnostics data with the instruction RDREC or RD_REC using data
record 0 and 1. The structure of the data records is available on the Internet in the "Manual
for interface module IM 155-5 DP ST (6ES7155-5BA00-0AB0)".
Table 5- 5 Diagnostics alarms, their meaning and corrective measures
Diagnostics alarm Error code
Wire break* 6
Parameter assign- 10
ment error
Load voltage missing 11
Hardware interrupt 16
lost
* If the supply voltage fails in case of a pending wire break diagnostics, the value status momentarily indicates an incorrect
value.
38
Meaning
Impedance of encoder circuit too high
H
Wire break between the module and
sensor
Channel not connected (open)
The module cannot evaluate parame-
•
H
ters for the channel
Incorrect parameter assignment
•
Supply voltage L+ of the module is miss-
H
ing
The module cannot trigger an interrupt
H
because the previous interrupt was not
acknowledged; possibly a configuration
error
Corrective measures
Use a different encoder type or modify
the wiring, for example, using cables with
larger cross-section
Connect the cable
Disable diagnostics
•
Connect a resistor of 25 kΩ to 45 kΩ
•
to the encoder contacts
Correct the parameter assignment
Connect supply voltage L+ to mod-
ule/channel
Change interrupt processing in the
•
CPU and, if necessary, edit the mod-
ule parameters.
The error persists until the module is
•
assigned new parameters
DI 32x24VDC HF digital input module (6ES7521-1BL00-0AB0)
Manual, 09/2016, A5E03485935-AF