Справочник Пользователя для Honeywell UDC2500

Step 

Lower Display = A1S1VA = Alarm 1, Setpoint 1 
 

 

 

A1S2VA = Alarm 1, Setpoint 2 

 

 

 

A2S1VA = Alarm 2, Setpoint 1 

 

 

 

A2S2VA = Alarm 2, Setpoint 2 

NOTES:  
With 3 position step control, alarms set for “output” will 
not function.  
MAN, RSP, AND FSAF selections do not have setpoint 
values. 

Change a value 

or

 

To change any alarm setpoint value in the upper display. 

Return to Normal 

Display 

 

 

The Three Position Step Control algorithm allows the control of a valve (or other 
actuator) with an electric motor driven by two controller output relays; one to move the 
motor upscale, the other to move it downscale, without a feedback slidewire linked to the 
motor shaft. 

The Three Position Step control algorithm provides an output display (“OT”) which is an 
estimated motor position since the motor is not using any feedback. 

•  Although this output indication is only accurate to a few percent, it is corrected each 

time the controller drives the motor to one of its stops (0 % or 100 %). 

•  It avoids all the control problems associated with the feedback slidewire (wear, dirt, 

and noise).  

•  When operating in this algorithm, the estimated “OT” display is shown to the nearest 

percent (that is, no decimal). 

See Motor Travel Time (the time it takes the motor to travel from 0 % to 100 %) in 
section 3.8. 

Step 

Access the 

Displays 

 

Until you see: 
Upper Display = PV 

Lower Display = OT (The estimated motor position in %)