Polling Auto Write (Pw) - Omron V600-CD1D-V2 Operation Manual

Types of Commands and Responses
Subcommand Format
Subcommand Response Format
Polling auto
read
Header

4-4-8 Polling Auto Write (PW)

Command Format
Polling auto
P
write
Header
ASCII/HEX code specification
A: ASCII code, JIS 8 code
H: HEX code
R/W Head No. specification
(fixed to 1)
Response Format
Polling auto
read
Header
P R 0 0 X
End code
00: Normal completion
74: Data Carrier not approaching (2nd time or later)
75: Polling auto processing terminated (before com-
munication processing with Data Carrier)
76: Polling auto processing terminated (when Data
Carrier has approached and during or after commu-
nication processing with Data Carrier)
When the host computer transmits the polling auto command, the ID Controller
immediately responds, indicating the reception of the command. After that, the
ID Controller writes data when the Data Carrier approaches. Meanwhile, the
host computer can make an inquiry on the result of the command processing by
using a subcommand.
1 frame = 266 characters max.
W A/H 1 X X
Polling auto
write
Header
∗
P R C/E 1
R/W Head No. specification (fixed to 1)
Inquiry on result of polling auto
processing/termination
C: Inquiry on result of processing
E: Termination
X X X
Read data (on normal completion only)
X X X X X
Specify the number of bytes to be written.
The number of bytes that can be read at a time is as follows:
ASCII: 256 characters (256 bytes)
HEX: 256 characters (128 bytes)
First address No. specification range
0000-07FF (2KB type)
0000-1FFF (8KB type)
Note: Addresses 0000 and 0001 cannot be written as these
are a production date area.
∗
P W 7 4
End code
74: Command received
Note: In this case, the end code is
either 74 or host communication
error.
Section
∗
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X
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