Honeywell VRX180 Manual De Usuario

One of the following messages is displayed when an unusual event has aborted the pretune.  “PTA” 
means “Pretune Abort.” 

 

PTA-WARM START 

A warm start occurred during pretune.  Repeat 
pretune. 

PTA-WENT OFFLINE 

Instrument went out of Online mode during pretune.  
Repeat pretune. 

PTA-LOOP STATUS 

Loop has PV that is bad (i.e. failed sensor) 

OR 

PV is a constant value such as from an upstream 
block in manual 

OR 

Loop has back calculation value from a downstream 
block that is bad or is the result of the downstream 
block being in manual. 

Repeat pretune. 

PTA-AM SEL CHNGE 

Loop switched between automatic and manual 

modes.  Repeat pretune. 

PTA-SP SEL CHNGE 

Loop was in automatic mode and an attempt was 

made to switch between Setpoint #1 and Setpoint #2.  
Repeat pretune. 

PTA-OUT MOVED 

Loop was in manual mode and loop’s output value 
changed.  Repeat pretune. 

PTA-SP MOVED 

Loop was in automatic mode and the setpoint value 
changed.  Repeat pretune. 

PTA-LOOP OS 

Loop is out of service.  Fix loop before repeating 
pretune. 

PTA-LOOP NOT CFG 

Loop is not configured.  Configure loop before 
repeating pretune. 

PTA-BAD STEP SIZ 

Step size is turned off.  Set step size to a value 
before repeating pretune.  See Table 7-11. 

PTA-ONOFF LOOP 

Cannot pretune an on/off type loop. 

PTA-BAD SN RATIO 

Increase step size. See Table 7-11. 

PTA-BAD OSC 

Repeat pretune with smaller gain or proportional 
band in loop. 

PTA-BAD ID VALUE 

Increase step size. See Table 7-11. 

PTA-DB ACCESS 

Unknown hardware problem.  Consult service. 

PTA-TASK FAIL 

Unknown hardware problem.  Consult service.