YOKOGAWA F3SP71-4S, User Manual

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3-13
IM 34M06P15-03E 2nd Edition: Jan. 31, 2012-00
3.11 Mask Write Register ($16)
Masks the value stored in a single holding register using AND or OR, and writes the
value.
The amount of devices that can be accessed with a single request is one point.
The value written into a holding register is as described below.
Written value = (Current value & AND mask value) | (OR mask value &
~
AND mask
value)
If the OR mask value is $0000, only AND processing of the AND mask value is
performed.
If the AND mask value is $0000, the OR mask value is the written value.
Response Format (Slave => Master)
F030113.VSD
Function Code
Data
$16
1-byte 2-byte 2-byte
Starting Register Nos.
($0000 to $FFFF)
AND Mask Value
($0000 to $FFFF)
Response Format (Master => Slave )
(At Normal Completion)
(At Faulty Completion)
Function Code
Data
$96
1-byte
Error Code
1-byte
OR Mask Value
($0000 to $FFFF)
2-byte
Function Code
Data
$16
1-byte 2-byte 2-byte
Starting Register Nos.
($0000 to $FFFF)
AND Mask Value
($0000 to $FFFF)
OR Mask Value
($0000 to $FFFF)
2-byte
Tip
This function reads the value stored in the holding register from the slave, performs AND/OR
processing, and then writes the value in the storage register. Accordingly, if the holding register value
changes during AND/OR processing, the changed value is overwritten.