134
Detailed Description of Services
Section 6-4
6-4-3
Composite Read from Variable Area
This service reads in order the contents of specified addresses in a variable
area.
■
Command
Service Request PDU
■
Response
Service Response PDU
The read data is read together with the variable type, in the order specified in
the command.
1.
Variable Type and Read Address
Refer to Parameter List on page 175.
Composite reads cannot be performed for the DA/9A variable types.
2.
Bit Position
The EJ1G does not support bit access. Fixed to 00.
3.
Response Codes
4.
No. of Read Data Items (Variable Type + Read Data)
MRC
2
2
0
1
4
SRC
2
0
4
2
0
0
2
4
2
0
0
Variable
type
Read address Bit
position
Variable
type
Read address Bit
position
Response code
Error name
Cause
1002
Command too short
The command is not long enough.
1101
Area type error
The corresponding variable type does not
exist.
110B
Response too long
The number of elements exceeds the
maximum.
1100
Parameter error
Bit position is not 00.
7011
Operation error (7011) The command cannot be executed due to
a device error.
0000
Normal completion
Processing was completed normally.
Read data length
No. of read data items
For double-word (8-digit) variable type
32 max. (0020H)
For word (4-digit) variable type
41 max. (0029H)
MRC
2
0
1
4
SRC
2
0
4
2
2
Response
code
Variable
type
Read data
Read data
Variable
type
No. of elements
×
8 or 4
No. of elements
×
8 or 4
Содержание EJ1G
Страница 1: ...USER S MANUAL Modular Temperature Controllers for Gradient Temperature Control EJ1G Cat No H143 E1 01 ...
Страница 3: ...iv ...
Страница 17: ...xviii ...
Страница 21: ...xxii ...
Страница 53: ...32 Unit Configuration Examples Section 2 4 ...
Страница 69: ...48 Changing SPs During Operation Section 3 3 ...
Страница 81: ...60 Other Functions Section 4 5 ...
Страница 145: ...124 Other HFU Functions Section 5 7 ...
Страница 167: ...146 Detailed Description of Services Section 6 4 ...
Страница 189: ...168 Determining the Error from the Current Situation for Heater Burnout Alarm Errors Section 7 8 ...
Страница 229: ...208 Parameters That Can Be Allocated for Programless Communications Appendix ...
Страница 237: ......