Mitsubishi MELSEC-Q QD77MS User Manual

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Chapter 3 Specifications and Functions
3.4.3 List of input signal details
The details of each QD77MS external input signal connector are shown below.
Signal name Pin No. Signal details
(+)
(HAH)
1A17
Manual pulse
generator/Incremental
synchronous encoder
A phase/PLS
(-)
(HAL)
1B17
(+)
(HBH)
1A18
Differential
type
Manual pulse
generator/Incremental
synchronous encoder
B phase/SIGN
(-)
(HBL)
1B18
Manual pulse
generator/Incremental
synchronous encoder
A phase/PLS
(HA) 1B19
Voltage-output/
open-collector
type
Manual pulse
generator/Incremental
synchronous encoder
B phase/SIGN
(HB) 1B20
(1) Phase A/Phase B
• Input the pulse signal from the manual pulse generator/incremental
synchronous encoder A phase and B phase.
• If the A phase leads the B phase, the positioning address will increase at
the rising and falling edges of each phase.
• If the B phase leads the A phase, the positioning address will decrease at
the rising and falling edges of each phase.
(a) Magnification by 4
[When increased] [When decreased]
Positioning
address
Positioning
address
+1 +1+1+1+1+1+1+1 -1 -1-1 -1 -1 -1 -1 -1
A phase
B phase
A phase
B phase
(b) Magnification by 2
[When increased] [When decreased]
Positioning
address
Positioning
address
+1 +1 +1 +1 -1-1 -1 -1
A phase
B phase
A phase
B phase
+1 +1 +1 +1 -1-1 -1 -1
(c) Magnification by 1
1) Positive logic
[When increased] [When decreased]
Positioning
address
Positioning
address
+1 +1 +1 +1 -1-1 -1 -1
A phase
B phase
A phase
B phase
2) Negative logic
[When increased] [When decreased]
Positioning
address
Positioning
address
+1 +1 +1 +1 -1-1 -1 -1
A phase
B phase
A phase
B phase

Mitsubishi MELSEC-Q QD77MS Specifications

General

Brand	Mitsubishi
Model	MELSEC-Q QD77MS
Category	Control Unit
Language	English