Chapter 2
2-9
CompoWay/F Communications Procedures
2-3
Detailed Description of Services
■
Read Variable Area
This service reads data from the variable area.
Service Request PDU
Service Response PDU
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
4.Response Code
Normal Completion
Error Completion
Number of elements
Processing
0000
The read operation is not performed (read data is not appended to the service
response PDU), and processing ends in a normal completion.
0001 or 0002
The read operation is performed, and processing ends in a normal comple-
tion.
Response code
Name
Description
0000
Normal completion
No errors were found.
Response code
Error name
Description
1001
Command too long
The command is too long.
1002
Command too short
The command is too short.
1101
Area type error
The variable type is wrong.
1103
Start address out-of-range
error
The read start address is out of range.
110B
Response too long
The number of elements is larger than 0002. (Number
of elements > 0002)
1100
Parameter error
Bit position is not 00.
2203
Operation error
CPU or EEPROM error
MRC
0
0
0
1
2
2
2
4
2
4
0
1
SRC
Variable type
Bit position Number of elements
Read start address
MRC
0
1
2
2
4
0, 8, or 16
0
1
SRC
Response code
Read data (for number of elements)
Содержание SYSDRIVE 3G3JV
Страница 1: ...Cat No I548 E1 01 COMMUNICATIONS MANUAL 3G3JE Compact Simplified Inverters...
Страница 14: ...Chapter 1 Communications Methods 1 1 Overview of Communications Methods...
Страница 38: ...Chapter 3 Communications Data 3 1 Variable Area Setting Range List 3 2 Status...
Страница 42: ...Chapter 4 Appendix 4 1 ASCII List...