Omron V600 Series Operation Manual page 41

Command Types and Responses
3-4-5 Polling Auto Read (PR)
Command Format
For 1 to 1 procedure
Polling auto
P
read
Header
Code specification
A: ASCII code
H: HEX code
R/W Head No.
For 1 to N procedure
Polling auto
@ Unit
read
00 to 15
Header
Code specification
A: ASCII code
H: HEX code
R/W Head No.
Response Format
For 1 to 1 procedure
Polling auto
read
Header
For 1 to N procedure
Polling auto
@ Unit
read
00 to 15
Header
Immediately after the host computer sends a polling auto command, the ID Con-
troller returns a response indicating that a command has been received. Subse-
quently, after waiting for the approach of the DC, the ID Controller reads the
data. During this time, the host computer can use subcommands to query the
command processing results. It can also send commands to the other R/W
Head.
R A/H 1/2 X X
Specify no. of bytes to be read in HEX code.
The number of bytes that can be read in one operation is as follows.
ASCII code specification: 256 bytes (256 characters)
HEX code specification: 128 bytes (256 characters)
Note: Refer to the previous page for information on the setting val-
No. P R A/H 1/2
∗
P R 7 4
End code (see page 48)
74: Command received.
Note: The end code in this case can only be either 74 or
No. P R 7
∗
X X X X
ues.
Start address No. specification range
X X X X X
Specify no. of bytes to be read in HEX code.
The number of bytes that can be read in one operation
is as follows.
ASCII code specification: 256 bytes (256 characters)
HEX code specification: 128 bytes (256 characters)
Note: Refer to the previous page for information on
the setting values.
Start address No. specification range
host computer communications error.
∗
4 FCS
End code (see page 48)
74: Command received.
Note: The end code in this case can only be either 74 or
host computer communications error.
Section
∗
X FCS
3-4
39