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Chapter 3 Specifications and Functions
Important
(Note-1): The BUSY signal turns ON even when position control of movement amount 0 is
executed. However, since the ON time is short, the ON status may not to be detected
in the sequence program.
(Note-2): "Positioning complete" of the QD77MS2/QD77MS4 refers to the point when the pulse
output from QD77MS2/QD77MS4 is completed.
Thus, even if the QD77MS2/QD77MS4's positioning complete signal turns ON, the
system may continue operation.
(2) QD77MS16
Device
No.
Signal name Details
X0 QD77 READY ON: READY
OFF: Not READY/
Watch dog
timer error
• When the PLC READY signal [Y0] turns from OFF to ON, the parameter setting range
is checked. If no error is found, this signal turns ON.
• When the PLC READY signal [Y0] turns OFF, this signal turns OFF.
• When watch dog timer error occurs, this signal turns OFF.
• This signal is used for interlock in a sequence program, etc.
PLC READY signal [Y0] OFF
ON
QD77 READY signal [X0] OFF
ON
X1 Synchronization flag OFF: Module
access
disabled
ON: Module
access
enabled
• After the PLC is turned ON or the CPU module is reset, this signal turns ON if the
access from the CPU module to the QD77MS is possible.
• When "Asynchronous" is selected in the module synchronization setting of the CPU
module, this signal can be used as interlock for the access from a sequence program
to the QD77MS.
X10
X11
X12
X13
X14
X15
X16
X17
X18
X19
X1A
X1B
X1C
X1D
X1E
X1F
Axis 1
Axis 2
Axis 3
Axis 4
Axis 5
Axis 6
Axis 7
Axis 8
Axis 9
Axis 10
Axis 11
Axis 12
Axis 13
Axis 14
Axis 15
Axis 16
BUSY
(Note-1)
OFF: Not BUSY
ON: BUSY
• This signal turns ON at the start of positioning, OPR or JOG operation. It turns OFF
when the "
Da.9
Dwell time" has passed after positioning stops. (This signal remains
ON during positioning.) This signal turns OFF when the positioning is stopped with
step operation.
• During manual pulse generator operation, this signal turns ON while the "
Cd.21
Manual pulse generator enable flag" is ON.
• This signal turns OFF at error completion or positioning stop.
Important
(Note-1): The BUSY signal turns ON even when position control of movement amount 0 is
executed. However, since the ON time is short, the ON status may not to be detected
in the sequence program.
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