Siemens CU240B-2 Parameter Manual page 313

p2299[0...n] CI: Technology controller limit offset / Tech_ctrl lim offs
Access level: 3
Can be changed: U, T
Units group: -
Min
-
Description: Sets the signal source for the offset of the output limiting of the technology controller.
Note: In mode p2251 = 1, p2299 must be connected to the output of ramp-function generator r1150 so that the technol-
ogy controller stops when the speed limits are reached (see also p2297, p2298).
p2302 Technology controller output signal starting value / Tec_ctr start val
Access level: 3
Can be changed: U, T
Units group: -
Min
0.00 [%]
Description: Sets the start value for the output of the technology controller.
When the technology controller is enabled (refer to p2200 and r0056.3) then its output signal (r2294) starts to run
from this starting value.
Dependency: The starting value is only effective in the mode "technology controller as main speed setpoint" (p2251 = 0).
Note: If the technology controller operates on the speed/setpoint channel (p2251 = 0), then the starting value is inter-
preted 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 fault signal inversion / Tec_ctrl fault inv
Access level: 3
Can be changed: T
Units group: -
Min
0
Description: Setting to invert the fault signal 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).
© Siemens AG 2011 All Rights Reserved
SINAMICS G120 Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
No inversion
Inversion
Calculated: -
Scaling: PERCENT
Unit selection: -
Max
-
Calculated: -
Scaling: -
Unit selection: -
Max
200.00 [%]
Calculated: -
Scaling: -
Unit selection: -
Max
1
Parameters
List of Parameters
Data type: U32 / FloatingPoint32
Data set: CDS, p0170
Factory setting
0
Data type: FloatingPoint32
Data set: -
Factory setting
0.00 [%]
Data type: Integer16
Data set: -
Factory setting
0
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