Micromod Micro-DCI: 53IT5100A Indicator/Totalizer - Manual (Page 71)

B.1.4 COMMUNICATION TRANSACTION EXAMPLES
Transaction A Example - Host or SUPERVISOR-PC requests 9 bytes of data beginning at hexa-
decimal memory address 1000H from the instrument at Datalink address 03.
1. Host or SUPERVISOR-PC sends INTERROGATE message.
01111110 11100011 00001001 00000000 00010000 11111100
SOH Command NUM LO ADD HI ADD LRC
+ I.A.
2. Instrument sends RESPONSE message.
01111110 00100011 00001001 00000000 00010000 XXXXX XXXXX XXXXX LRC
SOH Command NUM LO ADD HI ADD Data 1..................Data 9
+ I.A.
Transaction B Example - Host or SUPERVISOR-PC sends two bytes of new data, to be loaded
into the instrument at Datalink address 03 beginning at hexadecimal memory address 1000H.
1. Host sends CHANGE message.
01111110 10100011 00000010 00000000 00010000 00001000 00001100 11001001
SOH Command NUM LO ADD HI ADD Data 1 Data 2 LRC
+ I.A.
2. Instrument sends RESPONSE message.
01111110 00100011 00000010 00000000 00010000 00001000 00001100 01001001
SOH Command NUM LO ADD HI ADD Data 1 Data 2 LRC
+ I.A.
3. Host sends ACKNOWLEDGE message.
01111110 10000011
SOH Command
+ I.A.
4. Instrument performs the change requested at end of the current program scan.
Appendix B. Communications
B-5