Detailed Description Of Services; Read Variable Area - Omron EasySpeed 3G3JV Series Communications Manual

CompoWay/F Communications Procedures
2-3

Detailed Description of Services

Read Variable Area

This service reads data from the variable area.
Service Request PDU
MRC SRC Variable type
0 1 0 1
2 2 2
Service Response PDU
MRC SRC Response code
0 1 0 1
2 2
1.Variable Type and Read Start Address
For details on variable types and read start addresses, refer to Chapter 3 Communications Data.
2.Bit Position
Always "00." The 3G3JE does not support bit access.
3.Number of Elements
Number of elements
0000
0001 or 0002
4.Response Code
Normal Completion
Response code
0000
Error Completion
Response code
1001
1002
1101
1103
110B
1100
2203
Read start address Bit position Number of elements
0
4
Read data (for number of elements)
4
The read operation is not performed (read data is not appended to the service
response PDU), and processing ends in a normal completion.
The read operation is performed, and processing ends in a normal comple-
tion.
Name
Normal completion
Error name
Command too long
Command too short
Area type error
Start address out-of-range
error
Response too long
Parameter error
Operation error
0
2 4
0, 8, or 16
Processing
Description
No errors were found.
Description
The command is too long.
The command is too short.
The variable type is wrong.
The read start address is out of range.
The number of elements is larger than 0002. (Number
of elements > 0002)
Bit position is not 00.
CPU or EEPROM error
Chapter 2
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