Siemens FM 458-1 DP Manual page 63

SIMOLINK drive coupling
NDM Number of the defective module and/or node that detected the fault in
the line.
No. of waiting cycles
CO1
The number of the processor cycles specifies while the values by PCI
Copy are being waited for.
No. of CO1 Overruns
CO2
Group error bit
QF
QF=0 No error, QF=1 for error (if YF≠0)
5-6
(default: 0)
(default: 0)
(default: 0)
(default: 0)
Function Blocks - FM 458-1 DP
Edition 12.2004