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3-1
IM 34M06P15-03E 2nd Edition: Jan. 31, 2012-00
3. Command/Response
Details
3.1 Read
Coils
($01)
Reads the status (on/off) of a single or multiple coils.
The amount of devices that can be accessed with a single request is 1 to 2,000 points.
Request Format (Master => Slave)
F030101.VSD
Function Code
Data
$01
1-byte
2-byte
2-byte
Starting Coil Nos.
($0000 to $FFFF)
Read Points
($0001 to $07D0)
Response Format (Slave => Master)
(At Normal Completion)
Function Code
Data
$01
1-byte
Read Length
n
($01 to $FA)
1-byte
1-byte
Device Data
1
Device Data
n
1-byte
・・・
(At Faulty Completion)
Function Code
Data
$81
1-byte
Error Code
1-byte
・・
・
Bit Device Storage Order
- Stored from lower => higher-level bit order.
- Remainder bits are made "0".
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
Device Data 1
Device Data n
0 : OFF
1 : ON
Содержание F3SP71-4S
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