SINAMICS G120D
List Manual (LH14), 01/2016, A5E33842313
329
2 Parameters
2.2 List of parameters
Dependency:
The starting value is only effective in the mode "technology controller as main speed setpoint" (p2251 = 0).
If the technology controller is first enabled when the drive is switched on, a start speed remains ineffective, and the
controller output starts with the actual setpoint speed of the ramp-function generator.
Note:
If the technology controller operates on the speed/setpoint channel (p2251 = 0), then the starting value is interpreted
as the starting speed and when operation is enabled, is connected to the output of the technology controller (r2294).
If fault F07426 "technology controller actual value limited" occurs while ramping up to the starting value and if the
associated reaction has been set to "NONE" (see p2100, p2101), the starting value is kept as the speed setpoint
instead of a switch to closed-loop control operation.
Description:
Setting to invert the system deviation of the technology controller.
The setting depends on the type of control loop.
Value:
0:
No inversion
1:
Inversion
Caution:
If the actual value inversion is incorrectly selected, then the closed-loop control with the technology controller can
become unstable and can oscillate!
Note:
The correct setting can be determined as follows:
- inhibit the technology controller (p2200 = 0).
- increase the motor speed and in so doing, measure the actual value signal (of the technology controller).
- if the actual value increases with increasing motor speed, then the inversion should be switched out.
- if the actual value decreases with increasing motor speed, then the inversion should be set.
If value = 0:
The drive reduces the output speed when the actual value rises (e.g. for heating fans, intake pump, compressor).
If value = 1:
The drive increases the output speed when the actual value increases (e.g. for cooling fans, discharge pumps).
Description:
Sets the threshold value for the system deviation of the technology controller, which controls holding the controller
integral component in the range of the skip speeds of the ramp-function generator.
Recommendation:
To avoid speed setpoint steps in the range of the skip speeds, we recommend setting p2252 bit 4 = 1 (ramp-function
generator bypass de-activated).
Dependency:
The parameter has no effect for p2252 bit 5 = 1 (integrator hold de-activated).
Refer to: r2273
Note:
Only p2251 = 0:
If the output signal of the technology controller reaches a skip band in the speed setpoint channel, then the integral
component of the controller is held, if at the same time, the system deviation is lower than the threshold value set
here. By holding the integral component, it can be avoided that the controller oscillates in the range of the skip bands.
p2306
Technology controller system deviation inversion / Tec_ctr SysDev inv
CU240D-2_DP
CU240D-2_PN
CU240D-2_DP_F
CU240D-2_PN_F
Access level:
3
Calculated:
-
Data type:
Integer16
Can be changed:
T
Scaling:
-
Dyn. index:
-
Unit group:
-
Unit selection:
-
Func. diagram:
7958
Min Max
Factory
setting
0 1 0
p2339
Techn. controller threshold value f. I comp. hold for skip speed / Tec_ctrl thr_skip
CU240D-2_DP
CU240D-2_PN
CU240D-2_DP_F
CU240D-2_PN_F
Access level:
3
Calculated:
-
Data type:
FloatingPoint32
Can be changed:
U, T
Scaling:
PERCENT
Dyn. index:
-
Unit group:
9_1
Unit selection:
p0595
Func. diagram:
-
Min Max
Factory
setting
0.00 [%]
200.00 [%]
2.00 [%]
