Omron SYSDRIVE 3G3RV, User Manual

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Options
6-
145
Generally,
PG is A-phase driven when rotation is clockwise (CW) see from the input axis. Also, motor rota-
tion
is counter-clockwise (CCW) seen from the output side when forward commands are output. Conse-
quently,
when motor rotation is forward, PG is normally A-phase driven when a load is applied, and B-phase
driven
when a load is not applied.
n
Setting Number of Gear Teeth Between PG and Motor
Set
the number of PG gear teeth in F1-12 and F1-13. If there are gears between the motor and PG, you can
operate
the motor by setting the number of gear teeth.
When
the number of gear teeth has been set, the number of motor rotations within the Inverter is calculated
using
the following formula.
No.
of motor rotations (r/min.) = No. of input pulses from PC × 60 / F1-01 × F1-13 (No. of gear teeth on load
side)
/ F1-12 (No. of gear teeth on motor side)
n
Matching Motor Speed During Acceleration and Deceleration to Frequency Reference
You
can select whether to enable or disable integral operation during acceleration and deceleration.
To
match the motor speed as closely as possible to the frequency reference even during acceleration and decel-
eration,
set F1-07 to 1.
IMPORTANT
If F1-01 is set to 1, overshoot or undershoot may occur easily immediately after acceleration and decelera-
tion. To minimize the possibility of overshoot or undershoot occurring, set F1-01 to 0.
Inverter
Forward
command
Motor PG (encoder)
Pulse output
A-phase driven when set value = 0
B-phase driven when set value = 1
A-phase A-phase
B-phase
B-phase
Example: Forward rotation of standard Yaskawa motor (PG used: E6B2-CWZ6C)
Forward
command
Motor output axis rotates
counter-clockwise during In-
verter forward command.
Rotation
(CCW)
A-phase
B-phase
The standard PG has A-phase driven (CCW) when motor rotation is forward.