Honeywell VRX180 Manuale Utente

Summaries are available for all points, alarms and diagnostics in the instrument. 

Alarms are set up as part of the instrument configuration procedure (Section 4.13).  Up to 12 alarms can 
be configured. 

An alarm can be assigned to any analog data point (Analog Input, Analog Output, or Calculated Value) 
and can be one of these types. 

Alarm type 

Function 

HIGH 

Alarm when input value > setpoint value. 

LOW 

Alarm when input value < setpoint value. 

DEV (Deviation) 

Alarm when input value deviates above or below compare point 
value by an amount > setpoint value. 

HRATE (High Rate) 

Alarm when input value increases at rate > setpoint value, in units 
per minute.  Negative rate setpoints are processed as positive 
values.  May take up to 30 seconds to activate. 

LRATE (Low Rate) 

Alarm when input value decreases at rate > setpoint value, in units 
per minute.  Negative rate setpoints are processed as positive 
values.  May take up to 30 seconds to activate. 

 

An alarm programmed with delay will not activate before its delay time.  An alarm programmed with 
hysteresis will clear after its hysteresis delay. 

The alarm will remain active as long as the conditions causing it remain.  When the conditions no longer 
exist, the alarm will be “cleared” automatically.  “Clear” means that the indicators for the particular alarm 
on all displays will be removed and the alarm will be removed from the Alarm Summary list.