Siemens SINAMICS G120 List Manual page 338

2 Parameters
2.2 List of parameters
p2302 Technology controller output signal starting value / Tec_ctr start val
Access level: 3
Can be changed: U, T
Unit group: -
Min
0.00 [%]
Description: Sets the start value for the output of the technology controller.
If the drive is switched on and the technology controller is already enabled (see p2200, r0056.3), then its output
signal r2294 first goes to the start value p2302, before the controller starts to operate.
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.
p2306 Technology controller system deviation inversion / Tec_ctr SysDev inv
Access level: 3
Can be changed: T
Unit group: -
Min
0
Description: Setting to invert the system deviation of the technology controller.
The setting depends on the type of control loop.
Value: 0:
1:
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).
p2339 Techn. controller threshold value f. I comp. hold for skip speed / Tec_ctrl thr_skip
Access level: 3
Can be changed: U, T
Unit group: 9_1
Min
0.00 [%]
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
338
No inversion
Inversion
Calculated: -
Scaling: -
Unit selection: -
Max
200.00 [%]
Calculated: -
Scaling: -
Unit selection: -
Max
1
Calculated: -
Scaling: PERCENT
Unit selection: p0595
Max
200.00 [%]
SINAMICS G120 Control Units CU240B-2/CU240E-2
Data type: FloatingPoint32
Dyn. index: -
Func. diagram: 7958
Factory setting
0.00 [%]
Data type: Integer16
Dyn. index: -
Func. diagram: 7958
Factory setting
0
Data type: FloatingPoint32
Dyn. index: -
Func. diagram: -
Factory setting
2.00 [%]
List Manual (LH11), 01/2016, A5E33839529