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2 CompoWay/F Communications Procedures
E5@C Digital Temperature Controllers Communications Manual (H175)
2-3 De
tailed
Descrip
tion
of
the
Ser
vices
2
2-
3-2 Wr
ite Var
iab
le Ar
ea
• Error Occurred
(5) Precautions
• Alarm Function
Even though alarms are not displayed on the Controller's display, they function normally in
communications.
This service writes data to the variable area.
• Service Request PDU
• Service Response PDU
(1) Variable Type and Write Start Address
For details on variable types and write 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
Response code Error name Cause
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 exceeds
the maximum.
1100 Parameter error Bit position is not “00.”
2203 Operation error Non-volatile memory error
2-3-2 Write Variable Area
Number of elements Processing
0000
The write operation is not performed (do not append write
data to the service request PDU) and processing ends in a
normal completion.
Double word
(variable type C0, C1, or C3)
0001 to 0018
(1 to 24)
The write operation is performed and processing ends in a
normal completion.
Word
(variable type 80, 81, or 83)
0001 to 0030
(1 to 48)
MRC SRC
0 1 0 2 0 0
2 2 2 2 4 4
Variable
type
Start write
address
Bit
position
Number of
elements
Write Data (for number
of elements)
Number of elements
×
8 or 4
MRC SRC
0 1 0 2
2 2 4
Response
code