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4 FUNCTIONS
MELSEC-QnA
[Data link startup]
1
Turn on the refresh instruction (Yn0) and make the remote output (RY) data valid.
When the refresh instruction (Yn0) is off, all the remote output (RY) data is treated
as 0 (off).
2
Turn on the data link startup by the E
2
PROM parameters (Yn8) and start the data
link.
However, the parameters must be set in the E
2
PROM beforehand.
When the data link is started normally, the host data link status (Xn1) turns on.
POINT
The data link can also be started from the parameters written in the "parameter data area" in
the buffer memory. (Refer to chapter 6.)
[On/off data from remote I/O station/remote device station/local station
the master
station]
3
The input of remote I/O station, remote input (RX) of the remote device station and
the remote output (RY) of the local station are automatically (for each link scan)
stored in the master station's "remote input (RX)" in the buffer memory and local
station's "remote output (RY)" in the buffer memory.
4
The data in local station's "remote output (RY)" is also stored in other local station's
"remote output (RY)".
5
The input status stored in the "remote input (RY)" in the buffer memory is written to
the programmable controller CPU with the FROM instruction.
Remote device station
(station No. 2:
occupies 2 stations)
Local station
(station No.5:
occupies 4 stations)
...The last 2 bits cannot be used when the master station and the local station are communicating.
Remote I/O station
(station No. 1:
occupies 1 station)
Master station
RX0F to RX00
RX1F to RX10
RX2F to RX20
RX3F to RX30
RX4F to RX40
RX5F to RX50
RX6F to RX60
RX7D to RX70
RX8F to RX80
RX9F to RX90
RXAF to RXA0
Remote input (RX)
RXBF to RXB0
RXCF to RXC0
RXDF to RXD0
RXEF to RXE0
RXFD to RXF0
RX10F to RX100
RX7FF to RX7F0
to
RY0F to RY00
RY1F to RY10
RY2F to RY20
RY3F to RY30
RY4F to RY40
RY5F to RY50
RY6F to RY60
RY7D to RY70
RY8F to RY80
RY9F to RY90
RYAF to RYA0
Remote output (RY)
RYBF to RYB0
RYCF to RYC0
RYDF to RYD0
RYEF to RYE0
RYFD to RYF0
RYAF to RYA0
RY7FF to RY7F0
to
RY0F to RY00
RY1F to RY10
RY2F to RY20
RY3F to RY30
RY4F to RY40
RY5F to RY50
RY6F to RY60
RY7D to RY70
RY8F to RY80
RY9F to RY90
RYAF to RYA0
Remote output (RY)
RYBF to RYB0
RYCF to RYC0
RYDF to RYD0
RYEF to RYE0
RYFD to RYF0
RYAF to RYA0
RY7FF to RY7F0
to
X0F to X00
X1F to X10
RX0F to RX00
RX1F to RX10
Remote input (RX)
Local station
(station No.4:
occupies 1 station)