BECKHOFF EL6900-FB - Manual (Page 21)

Function blocks
Function blocks for TwinSAFE logic terminals 19
3.1.2.1 Diagnostic and status information for FB AND
Table 3-4: Diagnostic information (16-bit value)
Index Description
0-15 always 0
Table 3-5: Status information (8-bit value)
Index Description
0 undefined
1 RUN
2 STOP
3 SAFE
Note
KL6904
The checkboxes ‘Map State’ and ‘Map Diag’ are not available for the KL6904.