SSD 605C Product Manual - Normal Stopping Methods
Operating the Inverter
4-9
605C Frequency Inverter
Interaction between RUN and JOG
Only one of these signals can be in effect at any one time; the other signal is ignored. The
Inverter 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 (RUN
and HEALTH).
The RUN signal is TRUE from the time a start command is processed until a stop sequence is
completed. This normally means the time between the Inverter starting until the power stack is
quenched. Refer to Chapter 9: “Sequencing Logic States” for a more detailed description.
The HEALTH output is TRUE when the Inverter is not tripped.
Additional diagnostic parameters are available when using the Operator Station. These are
described in Chapter 6: “Programming Your Application” and Chapter 9: “Sequencing Logic
States”.
Starting and Stopping Methods
Note: Refer to Chapter 6: “Programming Your Application - REFERENCE, SEQUENCING LOGIC,
STOP and SYSTEM RAMP, for explanations of parameters.
Normal Stopping Methods
Macro 1 is set to “RAMPED” (see RUN STOP MODE function block) at STOP RATE set to
10.0s (see STOP function block).
With the Operator Station, or suitable programming tool, the Inverter can be selected to “Coast
to Stop”, or to “Ramp to Stop” at one of two rates (STOP RATE or FAST STOP RATE). The
stopping procedure is different for Local and Remote Start/Stop. Refer to “Start/Stop Controlled
Locally”, page 4-8 and “Start/Stop Controlled Remotely”, page 4-8.
Ramp to Stop
When a stop command is received, the Inverter decelerates from its actual speed towards zero
for the programmed RAMP DECEL RATE time. When this time has elapsed, SPEED TRIM is
ramped to 0% in the programmed STOP RATE time.
Note: If SPEED TRIM does not operate, SPEED DEMAND is reduced to 0% in RAMP DECEL RATE
time.
The power stack remains energised until the STOP DELAY period has elapsed.
DEFAULT
SPEED DEMAND
REMOTE SETPOINT
Speed 0%
RUN input
Ramp to zero speed at
RAMP DECEL RATE
Ramp SPEED TRIM to
zero at STOP RATE
SPEED TRIM
POWER
CIRCUIT
DISABLED
STOP DELAY
Figure 4-7 Ramp to Stop with a Remote Reference