Siemens SED2 Series, Руководство по эксплуатации

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Siemens Building Technologies SED2 variable speed drives CM1U5192en
HVAC Products Programming 01.2002
6.4 HVAC functions of the SED2
The functions listed below were implemented specifically in the SED2 for HVAC
applications.
6.4.1 PID controller
In order to achieve independent control within a stand-alone application by means of
the SED2 VSD, Siemens SBT implemented a proven PID controller. This controller
allows for temperature (LG-Ni 1000), pressure, and speed control.
The factory settings for the implemented PID parameters are designed for pressure
control.
For temperature or speed control, the controller's time constants must be adjusted to
the new control loop. See "Parameterizing the PID controller" below.
P2253
P2261
r 2262 : setpoint source
: setpoint filter timeconstant
: filtered setpoint
P2264
P2267
P2268
P2270
P2271
r 2272
P2274 : feedback source
: feedback threshold max
: feedback threshold min
: function sequence
: transducer type
: scaled feedback
: derivative time
: transient error signal
: P gain
: I gain
: ramp-up/-down time of PID limit
: PID output upper limit
: PID output lower limit
: actuator opening time
: actuator closing time
53.A = PID output at lower limit
53.B = PID output at upper limit
r2294: PID output
PID
CONTROLLER
r 2273
P2280
P2285
P2293
P2291
P2292
P2304
P2305
P0731/P0732 :
P0731/P0732 :
5192Z21en
Note:
The setpoint and the actual value signal are to be displayed as a percentage (%) or
absolute value. Make sure, however, that the two signals match each other.
P2201
Enter fixed setpoint
(or absolute value in %).
The setpoint is active if switching
command "ON" is sent to DIN1. Analog input
See the section on analog inputs for the
parameter settings.
P2253
Set to value 2224 (fixed PI setpoint).
P0701[0]
Enter value 16
(sets DIN1 to ON with fixed setpoint; see
section 6.3.1
Digital inputs ).
P2253[0]
Set to 755
(setpoint is configured to AIN 1).
P0756[0]
Select the type of analog input 1 for the
setpoint. See section Analog inputs.
P0757[0] to P0760[0]
Set scaling of AIN 1.
P0756[1]
Define the type of analog input 2 for the actual value signal
(see section 6.3.2 Analog inputs).
Parameterizing the PID
controller
(commissioning)
Fixed setpoint
External setpoint