Drive control and features
50
Speed control features
Jogging
Jogging is typically used during servicing or commissioning to control the machinery
locally. It involves rotating the motor in small increments until the desired load
position is achieved.
Two jogging functions (1 or 2) are available. When a jogging function is activated,
the drive starts and accelerates to the defined jogging speed (parameters 24.10
SPEED REF JOG1 and 24.11 SPEED REF JOG2) along the defined jogging
acceleration ramp. When the function is deactivated, the drive decelerates to a stop
along the defined jogging deceleration ramp. One push button can be used to start
and stop the drive during jogging.
Jogging functions 1 and 2 are activated by a parameter or through fieldbus. The
source of the jogging command is selected by bit pointer parameters 10.07 JOG1
START and 10.14 JOG2 START. For activation through fieldbus, see 2.12 FBA
MAIN CW.
The figure and table below describe the operation of the drive during jogging. (Note
that they cannot be directly applied to jogging commands through fieldbus as those
require no enable signal; see parameter 10.15 JOG ENABLE.) They also represent
how the drive shifts to normal operation (= jogging inactive) when the drive start
command is switched on. Jog cmd = State of the jogging input; Jog enable = Jogging
enabled by the source set by parameter 10.15 JOG ENABLE; Start cmd = State of
the drive start command.
Phase Jog
cmd
Jog
enable
Start
cmd
Description
1-2 1 1 0 Drive accelerates to the jogging speed along the acceleration ramp of the jogging function.
2-3 1 1 0 Drive runs at the jogging speed.
3-4 0 1 0 Drive decelerates to zero speed along the deceleration ramp of the jogging function.
4-5 0 1 0 Drive is stopped.
5-6 1 1 0 Drive accelerates to the jogging speed along the acceleration ramp of the jogging function.
6-7 1 1 0 Drive runs at the jogging speed.
7-8 x 0 1 Jog enable is not active; normal operation continues.
8-9 x 0 1 Normal operation overrides the jogging. Drive follows the speed reference.
9-10 x 0 0 Drive decelerates to zero speed along the active deceleration ramp.
10-11 x 0 0 Drive is stopped.
Time
Speed
12 3456789 1011 1213
14
15 16
Jogging example
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