32
IMSRM52-E4
6. REMOTE INPUT/OUTPUT AND
REMOTE
REGISTERS
6.1 Communication Between Master Station and Remote
Device Station
The SR Mini HG SYSTEM control unit (hereinafter, temperature control unit) which is a remote
device can process remote input (RX), remote output (RY) and remote registers (RWw and RWr).
Outline of communication between master station and remote device station
(1)
Turn on the refresh indication.
(2)
Start the data link.
(3)
The remote input (RX) of the remote device station (Temperature control unit) is stored in the
remote input (RX) of the master station by link scanning.
(4)
Read the data from the remote input (RX) using the FROM instruction.
(5)
Write the data in the remote output (RY) using the TO instruction.
(6)
The remote output (RY) of the remote device station (Temperature control unit) is turned on/off
by link scanning.
(7)
Write the data in the remote register (RWw) using the TO instruction.
(8)
The data is stored in the remote register (RWw) of the remote device station (Temperature control
unit) by link scanning.
(9)
The remote register (RWr) of the remote device station (Temperature control unit) is stored in the
remote register (RWr) of the master station by link scanning.
(10)
Read the data from the remote register (RWr) using the FROM instruction.
For details of the communication, see the
Instruction manual for PLC
.
Set Yn0
Set Yn6
CPU of PLC
Master station
Remote device station
(Temperature control unit)
FROM
TO
TO
FROM
Remote output
(RY)
Remote input
(RX)
Remote register
(RWr)
Remote register
(RWw)
Link scan
Link scan
Link scan
Link scan
Buffer memory
000h to 7FFh
Start the data link
Refresh indication
Remote register
(RWw)
Remote register
(RWr)
Remote output
(RY)
Remote input
(RX)
(2)
(1)
(10)
(7)
(4)
(5)
(9)
(8)
(6)
(3)
1E0h
2DFh
1DFh
3DFh
15Fh
160h
2E0h
0E0h
[Control RUN/STOP
transfer, Extension
No. setting etc.]
[Temperature
measured value (PV)]
[Temperature set
value (SV)]
[Alarm status, etc.]
