Mitsubishi Electric MELSEC-LD77MS2 User Manual page 94

(3) Manual pulse generator/Incremental synchronous encoder input
(a) Specifications of manual pulse generator/incremental synchronous encoder
Item
(Note-1)
Signal input form
Maximum input pulse frequency
Pulse width
Leading edge/trailing edge time
Phase difference
Rated input voltage
High-voltage
Low-voltage
Differential voltage
Differential-output
type
Cable length
(26LS31 or
equivalent )
Example of waveform
Maximum input pulse frequency 200kpps (After magnification by 4, up to 800kpps)
Pulse width
Leading edge/trailing edge time
Phase difference
Rated input voltage
High-voltage
Low-voltage
Voltage-output
Cable length
type/Open-
collector type
(5 V DC)
Example of waveform
(Note-1): Set the signal input form in "
Manual pulse generator/
Pr.24
Incremental synchronous encoder
input selection
Phase A/Phase B
PLS/SIGN
(Note-2): Maximum input pulse frequency is magnified by 4, when "A-phase/B-phase Magnification by 4" is set in "
Manual pulse generator/Incremental synchronous encoder input selection".
Magnification by 2/Magnification by 1), PLS/SIGN
1Mpps (After magnification by 4, up to 4Mpps)
Phase A
Phase B
Phase A
Phase B
Manual pulse generator/Incremental synchronous encoder input selection".
Pr.24
Positive logic
Forward run
HIGH
3 - 24
Chapter 3 Specifications and Functions
Specifications
Phase A/Phase B (Magnification by 4/
1µs or more
0.25µs or less
0.25µs or more
5.5 V DC or less
2.0 to 5.25 V DC
0 to 0.8 V DC
0.2V
Up to 30m (98.43ft.)
1 s or more
0.5 s or more 0.5 s or more
0.25 s or more
0.25 s
or less
(Note): Duty ratio 50%
5µs or more
1.2µs or less
1.2µs or more
5.5 V DC or less
3.0 to 5.25 V DC/2 mA or less
0 to 1.0 V DC/5 mA or more
Up to 10m (32.81ft.)
5 s or more
2.5 s or more 2.5 s or more
1.2 s or more
1.2 s
or less
(Note): Duty ratio 50%
Input signal logic selection
Pr.22
Reverse run Forward run
LOW
LOW
(Note-2)
0.25 s
or less
(Note-2)
1.2 s
or less
Negative logic
Reverse run
HIGH
Pr.24