Rockwell Automation 1770, D17706.5.16 Ref Mnl DF1 Protocol Command - Manual (Page 195)

10–24 Diagnostic Status Information
Publication 1770Ć6.5.16 - October 1996
Bytes Description Contents Bits
6 - 7 all Program Change Sequence Count 1 word
8 - 9 all Data Change Sequence Count 1 word
10 - 11 all UserĆDefined Data Change
Sequence Count
1 word