Parker AC890 Product Manual page 111

Operating the Drive
Start/Stop Controlled Locally
The reference value is set by the SETPOINT (LOCAL) parameter. (The direction of rotation is controlled
by the DIR key (forward/reverse) on the 6901 Keypad). When the RUN key is pressed 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 even when the RUN key is released. Press the STOP key to "stop" the drive.
When the JOG key is pressed and held, the SPEED DEMAND ramps up to the JOG SETPOINT at a ramp
rate set by JOG ACCEL TIME (not shown in the diagram). Release the JOG key to "stop" the drive.
Interaction between RUN and JOG
Only one of these signals can be in effect at any one time; the other signal is ignored. The drive must be
"stopped" to change from running to jogging, or vice versa.
Start/Stop Mode Diagnostics
In the configuration shown, Start/Stop mode provides two DIGITAL OUTPUT signals (RUNNING and
HEALTH).
The RUNNING signal is TRUE from the time a start command is processed until a stop sequence is
completed. This normally means the time between the drive starting until the power stack is quenched.
Refer to Appendix B : "Sequencing Logic" for a more detailed description.
The HEALTH output is TRUE when the drive is not tripped.
Additional diagnostic parameters are available when using the Keypad. These are described in Chapter 8:
"Keypad Menus".
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Page 890SD (Standalone) Drive: Frame G, H & J