YOKOGAWA F3SP71-4S, User Manual

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3-15
IM 34M06P15-03E 2nd Edition: Jan. 31, 2012-00
3.13 Read FIFO Queue ($18)
Reads the value(s) of a single or multiple holding registers.
The amount of devices that can be accessed with a single request is 1 to 31 points.
Request Format (Master => Slave)
F030115.VSD
Function
Code
Data
$18
1-byte 2-byte
FIFO Pointer Nos.
($0000 to $FFFF)
Response Format (Slave => Master)
(At Normal Completion)
(At Faulty Completion)
Data
$98
1-byte
Error Code
1-byte
Data
2-byte 2-byte
Device Data
1
Device Data
n
2-byte
･･･
2-byte
FIFO Count
($0000 to $001F)
Function
Code
Length
($0002 to $0040)
Function
Code
$18
1-byte
3.