Delta AH500 Manual page 323

Checksum (CS)
Receiving a full record:
『Start bit』 + 『Length』 + 『Length (repeat)』 + 『Start bit (repeat)』 + 『Instrument (IA)』 + 『Function
field (FF)』+『Parameter index (PI)』+『Data block (DB)』+『Checksum (CS)』+『End mark』
16#68+(Null)+(Null)+16#68+D0+(Null)+D1+D100+(Summation of the characters starting from
IA to the last data type)+16#16
Start bit: 16#68
Ch ap te r 8 Ser ia l C om mu nic a ti on Mod ul e AH1 0/15 SC M
End mark: 16#16
Length─Length (repeat): 2 bytes are
ignored.
8 - 6 1