Omron V600-CD1D-V2 Operation Manual page 38

Command Format
Command/Response Format
Type
Header Command
Response
Text Command
Response
Terminator Indicates end of command or response.
∗
Note:
The command sent from the host computer to the ID Controller, and the re-
sponse returned from the ID Controller to the host computer are in the following
format:
1 frame = 266 characters max.
X X X X
Header
Two-character symbol indicating operation.
Symbol same as header of executed command
Contents of processing:
– ASCII/HEX code specification
– R/W Head no. specification (fixed to 1)
– Processing start address
– Number of bytes to be processed (for read command), write data (for write
command)
Result of processing
– End code
– Read data (for read command)
indicates "2A"H of ASCII code, and CR indicates "0D"H.
If the length of an expansion command exceeds 266 characters, or the length of
a response to an expansion command exceeds 256 characters, the command
or response is divided into several frames as follows. At this time, the terminator
(∗CR) is appended to the last frame, and a delimiter (CR) is appended to the oth-
er frames.
If response length exceeds 256 characters (for expansion read command):
After transmitting a response which is not the last frame, the ID Controller
transmits the next response frame when it has received a delimiter (CR)
from the host controller.
Command
<Host >
<ID Controller>
Delimiter: CR
∗
......... X
CR
Text Terminator
Description
Response
Section 4-3
33