Omron OMNUC W Series User Manual page 294

Operation
H Operation
• Incremental pulses are output from the Servo Driver through a frequency divider.
Encoder
• The output phases of the encoder signal output from the Servo Driver are as shown below (when divid-
er ratio Pn201 = encoder resolution).
Phase A
Phase B
Phase Z
• When the encoder divider rate is set to other than 2
phase difference for phases A and B is not 90°, but scatters for time T. (See the diagram below.)
Phase A
Phase B
In this diagram, T represents the processing circuit output between phase A and phase B, and n is an
integer that satisfies the following formula (with digits below the decimal point discarded).
n = resolution/encoder divider rate
Input to frequency divider
(processing circuit output)
4-5-8 Brake Interlock (All Operating Modes)
H Precautions for Using Electromagnetic Brake
• The electromagnetic brake Servomotor with a brake is a non-excitation brake especially for holding.
First stop the Servomotor, then turn OFF the power supply to the brake before setting the parameters.
If the brake is applied while the Servomotor is operating, the brake disk may become damaged or mal-
function due to friction, causing damage to the Servomotor.
H Function
• You can set the BKIR (brake interlock) signal output timing to turn ON and OFF the electromagnetic
brake.
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Driver
Processing
circuitry
Forward rotation side
t2
t1 t1 t1
Phase A
Phase B
T
Frequency
divider
Phase A
Phase B
Phase Z
n
(16,384, 8,192, 4,096, 2,048, 1,024, etc.), the
t1 = nT, t2 = (n+1)T
t2
t1 t1
Chapter 4
Phase A
Phase B
Phase Z
Reverse rotation side