Detailed Description Of The Services; Read Variable Area - Omron E5CC Communications Manual

2 CompoWay/F Communications Procedures
2-3

Detailed Description of the Services

2-3-1

Read Variable Area

This service reads data from the variable area.
• Service Request PDU
Variable
MRC SRC
0 1 0 1
2 2
• Service Request PDU
MRC SRC
0 1 0 1
2 2
(1) Variable Type and Read Start Address
For details on variable types and read start addresses, refer to Section 3 Communications Data for
CompoWay/F.
(2) Bit Position
Bit access is not supported. Fixed to "00."
(3) Number of Elements
Number of elements
Double word
(variable type C0, C1, or C3)
Word
(variable type 80, 81, or 83)
(4) Response Code
• Normal Completion
Response code
2 - 8
Read start Number of
Bit
type position
address
0 0
2 4 2
Response
Read data (for number
code
of elements)
4
Number of elements
× 8 or 4
0000
0001 to 0019
(1 to 25)
0001 to 0032
(1 to 50)
0000 Normal completion
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 completion.
Name
E5@C Digital Temperature Controllers Communications Manual (H175)
Processing
Description
No errors were found.