Siemens PM-E F pm DC24V PROFIsafe Installation And Operating Manual page 151

Special Features of Fault Detection in Application 1.2
The following table presents fault detection according to the sensor supply and the
parameter assignment for the short-circuit test:
Table 7- 30
Short-circuit DI0 with DI1
Short-circuit DI0 with DI4
Short-circuit DI0 with DI5
P short-circuit DI0
M short-circuit DI0
Discrepancy error
P-short circuit in sensor
supply
M-short circuit in sensor
supply or defective
Short-circuit SS with DI0
Supply voltage fault
*: Fault is detected only in case of signal corruption. In other words, the signal read differs from the
sensor signal (discrepancy error). If there is no signal corruption with respect to the sensor signal,
fault detection is not possible and is not required from a safety standpoint.
If the short-circuit test is not activated or the sensor supply to digital inputs is set to
"external", the wiring between the sensor and the input channel must be short circuit-proof.
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
7.6 EM 4 F-DI/3 F-DO DC24V PROFIsafe digital electronic module
EM 4 F-DI/3 F-DO DC24V PROFIsafe: Fault detection
Example of fault
WARNING
Error detection condition ...
Internal sensor supply Internal sensor supply
and short-circuit test
are activated
Yes*
No
Yes*
Yes*
Yes*
Yes
Yes
Yes
Yes*
Yes
and short-circuit test
are deactivated
Yes*
No
Yes*
Yes*
Yes*
Yes
No
Yes
Yes*
Yes
Fail-Safe Modules
external sensor
supply
Yes*
No
Yes*
Yes*
Yes*
Yes
No
Yes
Yes*
Yes
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