Continuous Read Command - Mitsubishi 800 Series User Manual

4 MONITORING SPECIFICATION

4.6.2 Continuous read command

(1) Continuous read command
(2) Command format
(3) Communication overview
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This is a command to read data for a specified number of points from the
specified head GOT internal device to the remote register.
Transfer Direction
RWwm (Higher byte)
RWwm (Lower byte)
Master station GOT
RWwm + 1
RWwm + 2 to RWwm + F
RWrn to RWrn + D
GOT Master station
RWrn + E, RWrn + F
When reading three points from the GOT internal device GD100 to the remote
register (RWr)
PLC CPU
TO
FROM
1) Store the continuous read command data in the master station's remote
register (RWw).
2) Turn on the GOT request flag, and read the data in GD100 to 102 are read to
the remote register (RWr) by storing the command data in the GOT remote
register (RWw).
(Command execution)
The GOT complete flag turns on when the command processing is complete.
3) By link scan, the read data is stored in the master station's remote register
(RWr).
4) Read the data to the PLC CPU using the FROM instruction, etc.
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Addresses
2: Continuous read setting
When the occupied points are 2 stations
1 to 6 : GOT internal device point to be read
When the occupied points are 4 stations
1 to 14 : GOT internal device point to be read
0 to 1023 : Head GOT internal device numbers to
be read
Stores the data to be read from the GOT internal
device
Master station
remote register
1)
RWw0
0203
H
RWw1 0064
H
RWr0
1234
H
4)
RWr1
0E54
H
RWr2 0066
H
MELSEC-GOT
Write data
———
———
GOT
remote register
2)
RWw0
0203
H
RWw1 0064
H
RWr0
1234
H
3)
RWr1
0E54
H
RWr2 0066
H
2)
GD100 1234
H
GD101 0E54
H
GD102
0066
H
GOT internal device
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