Siemens 6RA7086-6KS22 Operating Instructions Manual page 505

6ra70 series, microprocessor-based converters from 6kw to 2500kw for variable-speed dc drives, simoreg dc master

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Filter time for actual value for EMF controller precontrol

Filtering of actual speed value at the input of the EMF controller precontrol.

The purpose of this filter is to stabilize the EMF controller precontrol, even

when the actual speed signal is unsteady or distorted by harmonics.

Set EMF controller P component to zero

Set controller P component to zero

(i.e. to obtain pure I controller)

Controller P component is active

11.15 Ramp-function generator

(see also Section 8, Sheet G136 and Section 9)

See P639 and P640 for ramp-function generator setting parameters

Mode for rounding the ramp-function generator

If the setpoint is reversed during ramp-up (or ramp-down),

acceleration (deceleration) is aborted and initial rounding of the

deceleration (acceleration) process begins immediately. The

setpoint is not increased (decreased) any further, but the signal

at the ramp-function generator output has a breakpoint (i.e. a

step change in the acceleration rate).

If the setpoint is reversed during ramp-up or ramp-down,

acceleration/deceleration gradually changes to

deceleration/acceleration. The setpoint increases/decreases

further, but there is no breakpoint in the signal at the generator

output (i.e. there is no step change in the acceleration rate).

Ramp-down time of ramp generator with emergency stop (OFF3)

When the "Emergency stop" command is issued, the drive must normally

brake down to 0 speed along the current limit. If the mechanical design of

the drive makes this option impermissible or undesirable, then a value of > 0

can be set here. In this case, the drive brakes along the deceleration ramp

programmed here when the "Emergency stop" command is issued.

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