3-4SectionCommand Types and Responses
35
Note Addresses
0000 and 0001 represent the production date registration area, and
consequently data cannot be written to these addresses.
3-4 Command
T
ypes and Responses
3-4-1 Read (RD)
Data
is read from the DC. If the DC is not present, an error response (end code:
72 = DC not present) is returned.
Command Format
RDA/H1/2XXXX
Number
of
read
bytes
∗
Start address no. specification range
R/W Head no.
For 1 to 1 Procedure
Header
Read
ASCII/HEX
code specification
A: ASCII code
H: HEX code
Specify the number 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.
@. Unit No. R D A/H 1/2 X X X X
Start address no. specification range
∗
FCS
For 1 to N Procedure
No.
of
read
bytes
Read
R/W Head no.
Header
ASCII/HEX code specification
A: ASCII code
H: HEX code
Specify the number 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.
@. Unit No. R D A/H 1/2 X X X X
Start address no. specification range
∗
FCS
For 1 to N Procedure
No.
of
read
bytes
Read
R/W Head no.
Specify the number 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.
00 to 15
Response Format
R D 0.. 0 X X X X ∗
Header
Read
.......
Read
data
End code (see page
48)
00: Normal completion
For 1 to 1 Procedure
@. Unit No. R D 0 0 X X X X
∗
FCS
Read
Header
Read
data
.......
End code (see page
48)
00: Normal completion
For 1 to N Procedure
00
to 15
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