Siemens PM-E F pm DC24V PROFIsafe Installation And Operating Manual page 154

Et 200s distributed i/o system - fail-safe modules
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Fail-Safe Modules
7.6 EM 4 F-DI/3 F-DO DC24V PROFIsafe digital electronic module
Special Features of Fault Detection in Application 1.3
The following table presents fault detection according to the sensor supply and the
parameter assignment for the short-circuit test:
Table 7- 31
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 sensor supply
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.
See also
Requirements for Sensors and Actuators (Page 37)
Using ET 200S Fail-Safe Modules (Page 14)
154
EM 4 F-DI/3 F-DO DC24V PROFIsafe: Fault Detection (Application 1.3)
Example of fault
Internal sensor supply
Fault detection if ...
Internal sensor supply
and short-circuit test
and short-circuit test
are activated
Yes*
Yes
Yes*
Yes*
Yes*
Yes
Yes
Yes
Yes*
Yes
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
external sensor
are deactivated
Yes*
Yes
Yes*
Yes*
Yes*
Yes
No
Yes
Yes*
Yes
supply
Yes*
Yes
Yes*
Yes*
Yes*
Yes
No
Yes
Yes*
Yes

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