Instrument Answer Records - Honeywell CIU 888 Protocol Manual

A- 4
Appendix A - GPU Communication Protocol
A.3.1 X-record (Identification record)
For compatibility reasons the X-record is implemented. A default
answer will be given.
STX N
Item
STX
N
RX888 R100
ETX
BCC
A.3.2 Time-out record
A time-out record will be transmitted to the computer system after an
instrument group command is transmitted to the connected field
instruments. The time-out record will also be transmitted if there was a
malfunction in the field or in case a field instrument is not responding.
STX N
Item
STX 1
N 2
@ 3
0 4
ETX 5
BCC 6
A.4 Instrument answer records
After a correctly received instrument individual command, the
addressed instrument will answer to the CIU. This answer is passed on
to the computer system by the CIU (the CIU adds its own address to the
record).
STX N n
Protocol Manual - CIU Emulation
CIU 888
RX888 R100
Position(s) Description
1 Start of Text Character (Start of transmission)
2 CIU address (0-9)
3...9 Default answer
10 End of Text Character (End of transmission)
11 Block Check Character
@ 0
Position Description
Start of Text Character (Start of transmission)
CIU address (0-9)
Type of instrument is CIU858 compatible
(Zero) error code (default is 0)
End of Text Character (End of transmission)
Block Check Character
n TOI TOR
ETX BCC
ETX BCC
data data .... data
Part No.: 4417589_Rev13
ETX BCC