Operating Instructions

Chapter 6 – Programming
Siemens Building Technologies, Inc. 55
V/f control with FCC for textile applications, P1300=6
A combination of P1300 = 1 and P1300 = 5.
Communications
The SED2 includes an integral RS-485 serial interface. The optional door mounting kit for the
BOP/AOP includes an integral RS-232 interface. USS, P1, and N2 protocols are
implemented as part of the series. See Chapter 9 in this manual for more details.
SED2 HVAC Functions
PID Controller
To achieve independent control in a stand-alone SED2 application, Siemens Building
Technologies implemented a PID controller. This controller handles temperature (Ni 1000),
pressure, and speed control. Factory settings for the PID controller parameters are for
pressure control. For temperature or speed control, adjust the controller time constants for
the new control loop.
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
Figure 31. SED2 PID Controller.