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MELSEC-
A
3 SPECIFICATIONS AND FUNCTIONS
Device
No.
Signal name Details
RY(n+2)7
RY(n+4)7
Axis 1
Axis 2
Speed
change
request
OFF : No speed change
request
ON : Speed change
requested
When changing the speed during positioning operation, turn this signal ON
after setting a new speed value.
This signal executes a speed change on its rising edge.
RY(n+2)8
RY(n+4)8
Axis 1
Axis 2
Speed/positi
on
changeover
enable flag
OFF: Speed/position
changeover
disable
ON: Speed/position
changeover enable
When the speed/position changeover enable flag is turned ON, the
speed/position changeover signal (RX(n+1)A, RX(n+4)A) is made valid.
RY(n+2)9
RY(n+4)9
Axis 1
Axis 2
Manual
pulse
generator
enable flag
OFF: Manual pulse
generator
operation disable
ON: Manual pulse
generator
operation enable
This signal is used to set whether manual pulse generator operation is to be
enabled or disabled.
RY(n+2)A
RY(n+4)A
Axis 1
Axis 2
Zero point
return
request flag
OFF
request
OFF: No zero point return
request OFF
request
ON: Zero point return
request OFF
requested
This signal turns OFF the zero point return request flag (RX(n+1)F,
RX(n+4)F).
This signal turns OFF the zero point return request flag on its rising edge.
RY(n+2)B
RY(n+4)B
Axis 1
Axis 2
External
start valid
OFF: External start invalid
ON: External start valid
When this signal turns ON, an external start is made valid.
Initial data processing complete
RY(n+7)8 Initial data
processing
complete
OFF: Initial data
processing
incomplete
ON: Initial data processing
complete
When Initial data setting request (RY(n+7)9) turns ON after power-on or a
hardware reset, initial data setting is performed, and when it is completed,
this signal turns ON.
Initial data setting request flag
RY(n+7)9 Initial data setting
request flag
OFF: No initial data
setting request
ON: Initial data setting
requested
This signal turns ON when initial data setting or change is performed.
Fig. 3.1 shows the timings of the input/output signals, such as Initial data processing
request and Initial data processing complete, of the D75P2.
(1) Initial data setting
Executed by D75P2
Executed by sequence program
RX(n+7)8
Initial data processing request
RY(n+7)8
Initial data processing complete
RX(n+7)9
Initial data setting complete
RY(n+7)9
Initial data setting request
RX(n+7)B
Remote station READY
(2) Data change or block transmission
Executed by D75P2
Executed by sequence program
RX(n+7)9
Initial data setting complete
RY(n+7)9
Initial data setting request
RX(n+7)B
Remote station READY
Perform data (parameter, positioning data, etc.)
setting.
Fig. 3.1 I/O signal timings