3-4SectionCommand Types and Responses
41
3-4-6 Polling Auto Write (PW)
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 writes 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.
Start
address no. specification range
∗
Header
PWA/H1/2XXXXXXX X.......
For 1 to 1 procedure
Polling
auto
write
Code specification
A: ASCII code
H: HEX code
R/W Head no.
1 frame = 266 characters max.
Specifies the write data.
*The number of bytes that can be written in one operation is as follows.
ASCII code specification: 256 bytes (256 characters)
HEX code specification: 128 bytes (256 characters)
Note:
Addresses 0000 and 0001 are the production date
registration area, and consequently data cannot be
written to these addresses.
@ Unit No.
Header
For 1 to N procedure
PWA/H1/2XXXXXX
XX....... FCS
∗
Polling
auto
write
Code specification
A: ASCII code
H: HEX code
R/W Head no.
Specifies the write data.
*The number of bytes that can be written in one operation is as follows:
ASCII code specification: 256 bytes (256 characters)
HEX code specification: 128 bytes (256 characters)
(When specifying HEX code,specify one byte as two characters.)
Start address no. specification range
1 frame = 271 characters max.
00 to 15
Response Format
Pw74
Header
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
.
∗
For 1 to 1 procedure
Polling
auto
write
Polling auto
write
PW7 4
∗
@ Unit No.
FCS
For 1 to N procedure
Header
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
.
00 to 15
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