Definitions - Siemens 6RA7086-6KS22 Operating Instructions Manual

Function descriptions
9.4.1

Definitions

Ramp-up =
Ramp-down = Deceleration from high, positive to low, positive speeds (e.g. from 90% to 10%) or from
On transition from negative to positive speeds, e.g. -10% to +50%:
Ramp-up time refers to the time required by the ramp-function generator to reach the 100% output
Ramp-down time refers to the time required by the ramp-function generator to reach the 100% output
9.4.2 Operating principle of ramp-function generator
K0190
HLZ
K0192
100%
AR/2
Ramp generator setpoint
(K0192)
-100%
K0191
AR
(dv/dt)
dy/dt (K0191)
HLZ ... Ramp-up time (H303, H307, H311),
AR ... Lower transition rounding (H305, H309, H313), ER ... Upper transition rounding (H306, H310, H314)
1) Transition from ramp-down gradient to ramp-up gradient
2) The lower rounding switches to the upper rounding before the maximum ramp-down gradient is reached
3) Due to the input step change, only the last part of the upper transition rounding is executed here
9-12
Acceleration from low, positive to high, positive speeds (e.g. from 10% to 90%) or from
low, negative to high, negative speeds (e.g. from -10% to -90%)
high, negative to low, negative speeds (e.g. from -90% to -10%)
From -10% to 0 = ramp-down and
From 0 to +50% = ramp-up and vice versa
value, with a lower and upper transition rounding of 0 and a step change in the input
quantity from 0 to 100% or from 0 to -100%. The rate of rise at the output is the same in
response to smaller step changes in the input quantity.
value, with a lower and upper transition rounding of 0 and a step change in the input
quantity from 100% to 0 or from -100% to 0. The rate of rise at the output is the same in
response to smaller step changes in the input quantity.
RLZ
ER/2
AR/2
Ramp generator outout
(K0190)
AR 1)
ER
RLZ
HLZ
AR/2 ER/2
AR ER
RLZ ... Ramp-down time (H304, H308, H312)
2)
AR AR
SIEMENS AG
SIMOREG DC Master
05.05
t
AR
3)
t
6RX1700-0AD76
Operating Instructions