Mitsubishi Electric MELSEC-Q Series - Page 155

5 - 35
Chapter 5 Data Used for Positioning Control
[Pr.80] External input signal selection
Set whether to use "external input signal of servo amplifier" or "buffer memory of
QD77GF" as an external input signal (upper/lower limit signal or proximity dog
signal)".
1: External input signal of servo amplifier
2: Buffer memory of QD77GF
POINT
(1) When "2: Buffer memory of QD77GF" is set, operation is affected by the PLC
scan time.
(2) When "1: External input signal of servo amplifier" is set, use a servo amplifier
which enables input of the external input signal.
(3) When "0" or "3" to "6" is set, the error "External input signal selection error"
(error code: 936) occurs at turning the PLC READY signal [Y0] ON, and the
READY signal [X0] is not turned ON.
[Pr.24] Manual pulse generator/Incremental synchronous encoder input
selection
Set the manual pulse generator/incremental synchronous encoder input pulse
mode. (Only the value specified against the axis 1 is valid.)
0: A-phase/B-phase multiplied by 4
1: A-phase/B-phase multiplied by 2
2: A-phase/B-phase multiplied by 1
3: PLS/SIGN
Set the positive logic or negative logic in "[Pr.22] Input signal logic selection".
(1) A-phase/B-phase mode
• When the A-phase is 90° ahead of the B-phase, the motor will forward run.
• When the B-phase is 90° ahead of the A-phase, the motor will reverse run.
(a) A-phase/B-phase multiplied by 4
The positioning address increases or decreases at rising or falling edges
of A-phase/B-phase.
[Pr.22] Input signal logic selection
Positive logic Negative logic
+1
Reverse runForward run
A-phase
(A )
B-phase
(B )
+1+1+1+1+1+1+1 -1 -1 -1 -1 -1 -1 -1 -1
Positioning
address
+1
Reverse runForward run
A-phase
(A )
B-phase
(B )
+1+1+1+1+1+1+1 -1 -1 -1 -1 -1 -1 -1 -1
Positioning
address