INFICON SID-142 Thin Film Deposition Controller - Manual (Page 67)

Chapter 6 Computer Interface
6-2
6.3 Protocol
The SQS-142 program never initiates communications. It only responds to commands
from the host computer.
SQS-142 computer Interface commands fall into two general categories. Query
commands request data from the SQS-142 program. Update commands instruct the
SQS-142 program to take an action. The SQS-142 responds to both Query and Update
commands with a response that indicates the results of the command request.
Query Command:
@<command>;<param1>;…;<paramn>;<Chksum><CR>
Query Example: Software Version Query
@QU;11;44<CR>
Description:
@
Message start character
; Separator
QU Query Utility command
; Separator
11 Parameter 11 (SID142 Software Version)
; Separator
44 Checksum (see section that follows on checksums)
<CR> Carriage Return (ASCII 13)
Response Example: Software Version Query
@QU;<ACQ>;2.1.6;??<CR> (Response to Software Version query)
Description:
@;QU;<ACQ>;
Query Acknowledged (ASCII 06)
2.1.6 Message (Software Version)
; Separator
0C Checksum (actual checksum varies with different versions)
<CR> Carriage Return (ASCII 13)