The Start/Stop Mode Explained - Parker AC890 Product Manual

Operating the Drive

The Start/Stop Mode Explained

The default configuration below shows the drive in Remote control, (using the analog and digital inputs and
outputs). This example will be referred to in the following explanations.
Start/Stop Controlled Remotely
In the configuration shown, the reference value is obtained by summing ANALOG INPUT 1 and
ANALOG INPUT 2. The direction of rotation is controlled by DIGITAL INPUT 4. When the RUN input
(DIGITAL INPUT 1) is TRUE, the SPEED DEMAND ramps up to the reference value at a rate controlled
by ACCEL TIME. The drive will continue to run at the reference value while the RUN input remains
TRUE.
Similarly when the JOG input (DIGITAL INPUT 5) is TRUE, the SPEED DEMAND ramps up to the JOG
SETPOINT at a ramp rate set by JOG ACCEL TIME (not shown in the diagram).
The drive will continue to run at the JOG SETPOINT while the JOG input remains TRUE.
6-5
Page 890SD (Standalone) Drive: Frame G, H & J