APPENDIX. HOST COMMUNICATION PROTOCOL
IMR02E20-E1
114
3.
Identifier (2 digits)
The identifier specifies the type of data that is requested from the SRZ unit. Always attach the
ENQ code to the end of the identifier.
Refer to
8. COMMUNICATION DATA LIST (P. 34)
.
1.
ENQ
The ENQ is the transmission control character that indicates the end of the polling sequence. The
host computer then must wait for a response from the SRZ unit.
(3) Data sent from the SRZ unit
If the polling sequence is received correctly, the SRZ unit sends data in the following format:
If the length of send data (from STX to BCC) exceeds 136 bytes, it is divided into blocks by
ETB. In this case, the succeeding divided data is sent after STX.
1.
STX
STX is the transmission control character which indicates the start of the text transmission
(identifier and data).
2.
Identifier (2 digits)
The identifier indicates the type of data (measured value, status and set value) sent to the host
computer.
Refer to
8. COMMUNICATION DATA LIST (P. 34)
.
3.
Data
Data which is indicated by an identifier of SRZ unit, consisting of channel numbers, data, etc.
Each channel number and data are delimited by a space (20H). The data and the next channel
number are delimited by a comma (2CH).
Channel number: 3-digit ASCII code, not zero-suppressed. Channels without channel numbers
may exist depending on the type of identifier.
Data:
ASCII code, zero-suppressed with spaces (20H). The number of digits varies
depending on the type of identifier.
Identifier Data
BCC
ETB
STX
3.
2.
6.
4.
1.
Identifier Data
BCC
ETX
STX
3.
2.
6.
5.
1.
or
