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Detailed Description of Services
Section 6-4
6-4-8 Controller Attribute Read
This service reads the model number and communications buffer size.
■ Command
Service Request PDU
■ Response
Service Response PDU
1. Model
From 1 to 10 in 1-2-3 Model Number Legend can be read.
Example:
2. Buffer Size
The communications buffer size is expressed in 2-byte hexadecimal, and
read after being converted to 4-byte ASCII.
The buffer size is the smaller of the send and receive buffer sizes.
3. Response Codes
MRC
2
05
SRC
2
3
0
Response code Error name Cause
1001 Command too long The command is too long.
7011 Operation error (7011) The command cannot be executed due
to a device error.
7015 Operation error (7015) The command cannot be executed
while resetting (including during star-
tup).
0000 Normal completion Processing was completed normally.
MRC
2
05
SRC
2
3
0
4 10
4
Response
code
Model
Buffer size
N - T C 4 A Q Q1JE -
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Input range
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