Delta AH500 Manual page 322

AH5 00 M od ul e M anua l
Type 5: Sending a control record, and receiving a full record:
Sending a control record: The function field is 16#89.
『Start bit』+『Length』+『Length (repeat)』+『Start bit (repeat)』+『Instrument address (IA)』
+『Function field (FF)』+『Parameter index (PI)』+『Checksum (CS)』+『End mark』
16#68+16#03+16#03+16#68+D0+16#89+D1+(Summation of the characters starting from IA
to PI)+16#16
Start bit─Length─Length (repeat)─Start bit
(repeat)
Function field (FF): 16#89
8 - 6 0
The instrument address (IA) is read from
D0.
The parameter index (PI) is read from
D1.