SSD 605C Product Manual - page 132
6-66
Programming Your Application
605C Frequency Inverter
SYSTEM RAMP
This function block forms part of the
reference generation. It provides the facility
to control the rate at which the Inverter will
respond to a changing setpoint demand.
MMI Menu Map
1 SETUP PARAMETERS
2 FUNCTION BLOCKS
3 SEQ & REF
4 SYSTEM RAMP
RAMP TYPE
RAMP ACCEL RATE
RAMP DECEL RATE
RAMP SYM RATE
RAMP SYM MODE
RAMP HOLD
SRAMP CONTINUOUS
SRAMP ACCEL
SRAMP DECEL
SRAMP JERK 1
SRAMP JERK 2
SRAMP JERK 3
SRAMP JERK 4
RAMPING
SYSTEM RAMP
RAMPING [698] – FALSE
LINEAR – [244] RAMP TYPE
–
** 10.0 s – [258] ACCEL RATE
–
** 10.0 s – [259] DECEL RATE
–
** 10.0 s – [267] SYMETRIC RATE
–
FALSE – [268] SYMETRIC MODE
–
FALSE – [260] RAMP HOLD
–
TRUE – [691] SRAMP CONTINUOUS –
10.00 % – [692] SRAMP ACCEL
–
10.00 % – [693] SRAMP DECEL
–
10.00 % – [694] SRAMP JERK 1
–
10.00 % – [695] SRAMP JERK 2
–
10.00 % – [696] SRAMP JERK 3
–
10.00 % – [697] SRAMP JERK 4
–
Parameter Descriptions
RAMP TYPE
Range: Enumerated - see below
Select the ramp type:
Enumerated Value : Ramp Type
0 : LINEAR
1 : S
ACCEL RATE
Range: 0.0 to 600.0 s
The time that the Inverter will take to ramp the setpoint, from 0.00% to 100.00%.
DECEL RATE
Range: 0.0 to 600.0 s
The time that the Inverter will take to ramp from the setpoint, from 100.00% to 0.00%.
SYMETRIC RATE
Range: 0.0 to 600.0 s
The time that the Inverter will take to ramp from 0.00% to 100.00% and from 100.00% to 0.00%
when SYMETRIC MODE is TRUE.
SYMETRIC MODE
Range: FALSE / TRUE
Select whether to use the ACCEL RATE and DECEL RATE pair of ramp rates, or to use the
SYMETRIC RATE parameter to define the ramp rate for the Inverter.
RAMP HOLD
Range: FALSE / TRUE
When TRUE the output of the ramp is held at its last value.
SRAMP CONTINUOUS
Range: FALSE / TRUE
When TRUE and the S ramp is selected, forces a smooth transition if the speed setpoint is
changed when ramping. The curve is controlled by the SRAMP ACCEL and SRAMP JERK 1 to
SRAMP JERK 4 parameters. When FALSE, there is an immediate transition from the old curve
to the new curve.
SRAMP ACCEL
Range: 0.00 to 100.00 %
Sets the acceleration rate in units of percent per second², i.e. if the full speed of the machine is
1.25m/s then the acceleration will be:
1.25 x 75.00% = 0.9375m/s²
SRAMP DECEL
Range: 0.00 to 100.00 %
This functions in the same way as SRAMP ACCEL above.