Mitsubishi MELSEC-Q QD77MS - Page 154

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Chapter 5 Data Used for Positioning Control
Pr.21
Current feed value during speed control
Specify whether you wish to enable or disable the update of "
Md.20
Current feed
value" while operations are performed under the speed control (including the
speed-position and position-speed switching control).
0: The update of the current feed value is disabled
The current feed value will not change.
(The value at the beginning of the speed control
will be kept.)
1: The update of the current feed value is enabled
The current feed value will be updated.
(The current feed value will change from the
initial.)
2: The current feed value is cleared to zero
The current feed will be set initially to zero and
change from zero while the speed control is in
effect.
Note1: When the speed control is performed over two to four axes, the choice
between enabling and disabling the update of "
Md.20
Current feed value"
depends on how the reference axis is set.
Note2: Set "1" to exercise speed-position switching control (ABS mode).
Pr.22
Input signal logic selection
Set the input signal logic that matches the signaling specification of the connected
external device, "
Cd.44 External input signal operation device" or external input signal
of servo amplifier (upper/lower limit switch, near-point dog).
Negative logic
(1) When the input signal contact is not flowed with the current.
(a) FLS, RLS
ON (Limit signal turn ON)
(b) DOG, DI, STOP
OFF
(2) When the input signal contact is flowed with the current.
(a) FLS, RLS
OFF (Limit signal turn OFF)
(b) DOG, DI, STOP
ON
Positive logic
Opposite the concept of negative logic.
Note1: A mismatch in the signal logic will disable normal operation. Be careful of
this when you change from the default value.
Note2: Set the manual pulse generator input logic selection (b8) to axis 1. (Setting
of any of axes 2 to 4 is invalid.)
Note3: If the same external input signal is set to use to "
Pr.80 External input signal
selection
" or " Pr.95
External command signal selection
" for the multiple axes in
the QD77MS16, "Input signal logic selection" of those axes should be the
same. Otherwise, "Input signal logic selection error" (error code: 938) will
occur when the PLC READY signal [Y0] is turned ON, and the QD77
READY signal [X0] will not be turned ON.