SSD 605C, Product Manual

Page: 47 / 236

Operating the Inverter
4-11
605C Frequency Inverter
Forced Coast Stop
Using the /Coast Stop mode immediately disables the power stack, causing the load to coast to a
stop. The Inverter gives priority to the /COAST STOP signal. The /FAST STOP signal is
therefore ignored while /COAST STOP is active.
The Trip Condition
When a trip condition is detected, a similar stopping method to /COAST STOP is used. The
power stack cannot be re-enabled until the trip condition has been cleared and successfully
reset.
Refer to Chapter 7: “Trips and Fault Finding” for further details.
Logic Stopping
The Inverter can be stopped by setting the /STOP to FALSE for a short time, (>100 ms). The
stop sequence continues even if the /STOP signal goes inactive before the Inverter is stopped.
Various combinations of stop logic are shown below.
POWER CIRCUIT DISABLED
SPEED DEMAND
REMOTE SETPOINT
Speed 0%
SPEED TRIM
/COAST STOP
Figure 4-11 Forced Coast Stop example
SPEED DEMAND
REMOTE SETPOINT
Speed 0%
RUN FWD
/STOP
REMOTE SETPOINT
RUN REV
RUN FWD ignored as
already running
RUN FWD acted on
immediately as previous
state was RUN FWD
RUN FWD not ignored
as now stopping
Figure 4-12 Interaction between RUN FWD, RUN REV and /STOP Parameters
SPEED DEMAND
JOG SETPOINT
Speed 0%
RUN FWD
/STOP
REMOTE SETPOINT
JOG
JOG ignored as
already running JOG immediately effective
as previous mode was JOG
JOG not ignored as now
stopping. Waits for stop to
complete before acting on
JOG
.
Figure 4-13 Example of the Interaction between RUN and JOG Parameters