13
2121341-06-11/20 (Translation of the original operating instructions)
Operating Instructions MODULAR SAFETY CONTROL SYSTEM MSC
MSC FIELDBUS MODULES CE-...
EN
5. Diagnostics
Each input and each safety output is linked to a relative diagnostic code.
If the I/O is connected correctly, the system exports 2 bytes to the fieldbus:
Ì
0 as index value
Ì
Diagnostic code OK (0x80)
If there is a problem on the I/O, the system sends two bytes to the fieldbus with:
Ì
The index for the related I/O
Ì
The relative diagnostic code
5.1. “I/O index” field
This field indicates the number of the I/O with the diagnostic code that is not OK. The area of the I/O index depends on the
base unit used. The possible values are shown in Table 8.
Signal type
I/O index
MSC-CB
MSC-CB-S
Input
1–128
1–128
Output
192–255
1–32
Table 8: “I/O index” field
I/O index
Figure 6:
I/O index