Siemens PM-E F pm DC24V PROFIsafe Installation And Operating Manual page 45

Channel-Specific Diagnostics
As with the ET 200S, there are three bytes available for channel-specific diagnostics, starting
at byte 35. Up to 9 channel-specific diagnostic messages are possible per station. Channel-
specific diagnostics for fail-safe modules are structured as follows.
Figure 5-1
Note
The module slot coding is contained in byte 35, bits 0 to 5. The following applies:
displayed number + 1 = module slot
(0 = slot 1; 1 = slot 2, and so forth)
Note
Channel-specific diagnostics data are always updated to the current diagnostic function in
the diagnostic message frame. Older, successive diagnostic functions are not deleted.
Remedy: Evaluate the valid, current length of the diagnostic message frame. To do this, use
the parameter RET_VAL of the SFC 13 in
ET 200S Distributed I/O System - Fail-Safe Modules
Installation and Operating Manual, 08/2008, A5E00103686-07
Structure of Channel-Specific Diagnostics
STEP 7
.
Diagnostics
5.2 Fault Diagnostics
45