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■ Write Variable Area
● Variable Type and Write Start Address
● Bit Position
● Number of Elements
● Response Code
This service writes data to a variable area.
Service Request PDU
Variable
Start
MRC SRC
type
write address
0
1 0 2
2
2
2
4
Note: The write data 12 indicates the weekly timer.
Service Response PDU
Response
MRC SRC
code
0
1 0 2
2
2
4
For details on variable types and write start addresses, see 3.1 Variable
Area (Data Range) List.
Variable type C0 is read-only.
Bits positions are always 00 except for work bits and HR bits. With the
ZEN, bit access supported only for work bits and HR bits.
For details on bits and applications methods, refer to 1-4 Memory Areas
in the ZEN Programmable Relay Operation Manual.
Note: Refer to Reading Work Bits and HR Bits on page 20 for details
on reading work bits and HR bits.
Always to 0001.
Normal Completion
Response
code
0000
Normal completion
2.3 Detailed Description of the Services
Bit
Number of
position
(for number of elements)
elements
0 0
0 1
2
4
8 or 12 (See note.)
Name
No errors were found.
Write Data
Description
21
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