Honeywell UDC2500 ユーザーズマニュアル

You can set the Failsafe Mode to be Latching or Non-Latching. 

Step 

Select Control  

Set-up Group 

 

Until you see: 
Upper Display = SET  

Lower Display = CONTRL 

Select Failsafe 

Function Prompt 

 

You will see: 
Upper Display =  
  LACH (Controller goes to manual and output goes to  
  

failsafe 

value) 

L (Controller mode does not change and output goes 

   

to failsafe value) 

Lower Display = FSMODE 

Select a value 

or

 

To select a failsafe mode in the upper display. 

Return to Normal 

Display 

 

At power up, the output will go to the value set. 

 

The Setpoint Ramp configuration group lets you enable and configure any of the 
following: 

•  SPRATE – a specific rate of change for any local setpoint change.  (Subsection 4.20) 
•  SPRAMP – a single setpoint ramp that occurs between the current local setpoint and 

a final local setpoint over a time interval of 1 to 255 minutes.  (Subsection 4.19) 

•  SPPROG – a ramp/soak profile in a 12-segment program. (Subsection 4.21) 

This section explains the operation of each selection and configuration reference where 
necessary. 

This is a standard feature.  At power-up, the setpoint is set to the current PV value and 
the Rate or Ramp or Program then starts from this value.