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2 CompoWay/F Communications Procedures
2 - 8
E5

C-T Digital Temperature Controllers Programmable Type Communications Manual (H186)
2-3 Detailed Description of the Services
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 Section 3 Communications Data for
CompoWay/F .
(2) Bit Position
Bit access is not supported. Fixed to “00.”
(3) Number of Elements
(4) Response Code
• Normal Completion
2-3-1 Read Variable Area
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.
Double word
(variable types C0, C1, C3, C4,
C5, C9, or DA)
0001 to 0019
(1 to 25)
The read operation is performed and processing ends in a
normal completion.
Word
(variable types 80, 81, 83, 84, 85,
89, or 9A)
0001 to 0032
(1 to 50)
Response code Name Description
0000 Normal completion No errors were found.
MRC SRC
0 1 0 1 0 0
2 2 2 2 4 4
V aria b le
type
Read start
address
Bit
position
Nu m b er of
elements
2 2
MRC SRC
0 1 0 1
4
Response
code
Read data (for n u m b er
of elements)
Nu m b er of elements
×
8 or 4