Omron M1 Series User Manual page 393

 Enabled in operation (when Jogging Operation Selection (E111) = "3," "4,"
"5")
• Jogging is performed even if the FW signal turns ON first.
However, if the JG signal turns OFF first, the motor comes to a free-run state.
If the JG signal is turned ON again with the motor in a free-run state (JG signal OFF and FW signal
ON), jogging operation is started again.
If the FW signal is turned OFF with the motor in a free-run state (JG signal OFF and FW signal
ON), and the FW signal is turned ON again, normal operation is performed.
 Relationship with DC braking
When the jogging function is used to perform inching, the inverter sometimes does not come to an
exact stop in applications such as turntables and rotates an extra bit more before it comes to a
stop.
In vector control, the braking torque just before the stop can be adjusted so that the inverter comes
to an exact stop by adjusting the speed adjuster (ASR). However, in V/f control, sufficient braking
torque sometimes cannot be ensured simply by adjusting the torque boost.
In cases like these, jogging operation and the DC braking function are used in combination to ad-
just inching.
For details on DC braking, refer to 7-5-1 DC Injection Braking (DB) on page 7-63.
Operation when the RUN command is turned OFF during jog operation with the DB (DC braking)
terminal turned ON is as follows.
(Example: When External DC Injection Braking Edge/Level Selection (E115) = "1: Level operation")
• When E111 = 0, 3, operation immediately becomes free run when the RUN command turns OFF,
and immediately DC braking by the DB terminal operates.
M1 Series Standard Type User's Manual (I669)
JG
FW
0 Hz
Frequency
Reference
Output frequency
Jogging Frequency (C20)
H54
Output gate
Fig.: Jogging operation switching while inverter is running
Fig.: Operation when jogging is canceled
H55 H54 H55
H55
C20
5 Basic Settings
5
5-63