Siemens PM-E F pm DC24V PROFIsafe Installation And Operating Manual page 131

Diagnostic Function*
Discrepancy error (1oo2
evaluation)
safety-oriented tripping
*: Specially for F-modules; display in
Safe Modules" table
Note
If you have activated the short-circuit test for the F-DI module in
one of the two internal sensor supplies of the module (Vs1 or Vs2), a channel M-short circuit
is then detected for each of the four channels with a sensor supply that is not used. Four
"short-circuit" diagnostic functions are generated in the diagnostic buffer of the F-module.
Special Features of Fault Detection
The detection of certain faults (short-circuits or discrepancy errors, for example) depends on
the application, the wiring, and the parameter assignment of the short-circuit test and the
sensor power supply. For this reason, tables on fault detection for the applications are
presented in
SIL3/Category 4/PLe"
Causes of Faults and Corrective Measures
The following table contains the possible causes of the faults described for the individual
diagnostic messages of the EM 4/8 F-DI DC24V PROFIsafe and remedies.
Table 7- 25
Diagnostic
Message
Short circuit
Overtemperature Shutdown due to violation of upper or
Internal error
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
Fault
Number
19
H
STEP 7
"Application 1: Safety mode SIL2/Category 3/PLd" to "Use case 3: Safety mode
.
Diagnostic messages of the EM 4/8 F-DI DC24V PROFIsafe, causes of errors and
remedies
Possible Causes
Short circuit in the sensor
Cross circuit in the sensor
Encoder supply short-circuit
Internal error
lower temperature limit value in the
module case.
Internal module fault has occurred
7.5 4/8 F-DI DC24V PROFIsafe Digital Electronic Module
LED Signaled in
Application
SF 2,3
, see "Channel-Specific Diagnostics, Fault Types of Fail-
Corrective Measures
Eliminate short circuit/cross circuit
Check the sensor supply
Replace module
Check load wiring, check ambient
temperature, check whether permissible
output current is exceeded for the ambient
temperature. Once the fault has been
eliminated, the module must be removed
and inserted or the power switched OFF
and ON.
Replace module
Fail-Safe Modules
Effective Can be
Range of Assigned
Diagnostics Parameter
s
Channel No
STEP 7
and are using only
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