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3 SPECIFICATION
MELSEC-QnA
(14) Module ready: XnF
Indicates if the module is ready for operation.
(a) Turns on automatically when the module becomes ready for operation
Used as an interlock signal when a sequence program is used to make
access to the master/local module.
(b) Turns off when one of the following conditions occur:
• There is an error in the module switch settings.
• The module reset request signal (Yn4) is turned on.
• The module error signal (Xn0) is turned on.
Module ready
(XnF)
Module error
(Xn0)
Module reset request
(
Yn4
)
Power supply ON
(15) Refresh instruction: Yn0
Indicates if the content of remote output RY (address 160H to 1DFH) in the buffer
memory is effective or not. Same meaning for local stations.
For remote input RX and remote register RWr/RWw except remote output RY,
refresh is continued independently of this signal.
OFF : Not effective (Sends all-off data.)
ON : Effective (Sends data in "remote output (address 160
H to 1DFH)" in the
buffer memory.)
Master station Remote I/O station
Input
Output
Remote device station
Remote input (RX)
Remote output (RY)
Local station
Remote output (RY)
Remote input (RX)
Remote input (RX)
Remote output (RY)
POINT
(1) Yn0 is set (on) before the data link start up.
(2) Yn0 is turned off when the programmable controller CPU is in the STOP status.