Function Description; Output Signals; Ab Quadrature Signal Minimum Phase Diff Erence Time And Maximum Response Speed - Magnescale Mj632 Bedienungsanleitung

3. Function Description

3-1. Output Signals

Th e MJ632 outputs the AB quadrature signals, reference point signals, and alarm signals
as shown in Fig. 3-1.
Minimum phase difference time: Tw: 100 ns (When set to a minimum phase difference time of 100 ns)
Tw Tw Tw Tw
A
B
Resolution settings
1/4 reference
point signals
ALARM
• Th e PL101 head unit travel is detected in 50 ns increments and is output at a phase
diff erence time proportional to the amount traveled. Th e phase diff erence time changes
in integral multiples of 50 ns
• When alarm signals are detected, the alarm signals become active, and AB quadrature
signals change to high impedance.
3-2. AB Quadrature Signal Minimum Phase Diff erence Time
and Maximum Response Speed
Th e AB quadrature signal minimum phase diff erence time changes based on the travel
speed of the head unit. When a minimum phase diff erence time that is less than the AB
quadrature signal minimum phase diff erence time of your model is reached, a speed
alarm is output. (See "2-2. Model Name".) Th e speed just before the speed alarm is output
is the maximum response speed.
Maximum response speed (m/s)
Number of
Resolution
division
4000 0.2 μm
1600 0.5 μm
800 1.0 μm
400 2.0 μm
160 5.0 μm
80 10 μm
In models where the AB quadrature signal minimum phase diff erence time is 25 μs, the
resolutions of 0.2 μm and 0.5 μm are not available.
MJ632
Tw +N 50 ns
N: Fluctuation due to travel speed
100 ns 150 ns 200 ns
1.4 m/s 0.9 m/s 0.7 m/s
3.5 m/s 2.3 m/s 1.8 m/s
7 m/s 4.6 m/s 3.7 m/s
14 m/s 9.3 m/s 7.5 m/s
35 m/s 23 m/s 18 m/s
70 m/s 46 m/s 37 m/s
Travel direction
reversal
Fig. 3-1
Minimum phase diff erence time
250 ns 300 ns
0.6 m/s 0.5 m/s
1.5 m/s 1.2 m/s
3.0 m/s 2.5 m/s
6.0 m/s 5.0 m/s
15 m/s 12.5 m/s 7.5 m/s
30 m/s 25 m/s
High impedance
500 ns 2.5 μs 25 μs
0.3 m/s 0.04 m/s —
0.7 m/s 0.15 m/s —
1.5 m/s 0.3 m/s 0.02 m/s
3.0 m/s 0.6 m/s 0.06 m/s
1.5 m/s 0.15 m/s
15 m/s 3.0 m/s 0.3 m/s
3
(E)