Mitsubishi MELSEC-Q QD77MS, User Manual

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Chapter 3 Specifications and Functions
(3) Manual pulse generator/Incremental synchronous encoder input
(a) Specifications of manual pulse generator/incremental synchronous encoder
Item Specifications
Signal input form
(Note-1)
Phase A/Phase B (Magnification by 4/
Magnification by 2/Magnification by 1), PLS/SIGN
Maximum input pulse frequency
1Mpps (After magnification by 4, up to 4Mpps)
(Note-2)
Pulse width 1µs or more
Leading edge/trailing edge time 0.25µs or less
Phase difference 0.25µs or more
High-voltage 2.0 to 5.25VDC
Low-voltage 0 to 0.8VDC
Differential voltage 0.2V
Cable length Up to 30m (98.43ft.)
Differential-output
type
(26LS31 or
equivalent )
Example of waveform
Phase A
Phase B
(Note): Duty ratio 50%
1 s or more
0.5 s or more
0.25 s or more
0.25 s
or more
0.5 s or more
0.25 s
or more
Maximum input pulse frequency 200kpps (After magnification by 4, up to 800kpps)
(Note-2)
Pulse width 5µs or more
Leading edge/trailing edge time 1.2µs or less
Phase difference 1.2µs or more
High-voltage 3.0 to 5.25 VDC
Low-voltage 0 to1.0VDC
Cable length Up to 10m (32.81ft.)
Voltage-output/
Open-collector
type (5VDC)
Example of waveform
Phase A
Phase B
(Note): Duty ratio 50%
1.2 s
or more
1.2 s or more
2.5 s or more
5 s or more
2.5 s or more
1.2 s
or more
(Note-1): Set the signal input form in "
Pr.24
Manual pulse generator/Incremental synchronous encoder input selection".
Pr.22
Input signal logic selection
Positive logic Negative logic
Pr.24
Manual pulse generator/
Incremental synchronous encoder
input selection
Forward run Reverse run Forward run Reverse run
Phase A/Phase B
PLS/SIGN
HIGH
LOW
HIGH
LOW
(Note-2): Maximum input pulse frequency is magnified by 4, when "Phase A/Phase B Magnification by 4" is set in "
Pr.24
Manual pulse generator/Incremental synchronous encoder input selection".