Despatch 1500 Controller - Manual (Page 16)

Page 10 Despatch/Watlow 1500 Control Instruction Manual
Parameter
FUNCTION
Display
Description
Proportional
Band Pb
Reset RS
Rate RT
Rate Band Rb Rate band defines where the rate function will occur. The
rate band will occur at one to seven times the proportional
band. With a 0 entry, rate is always in effect.
Cycle Time CT
Dead Band db The dead band defines an area on either side of set point
where no switching action will occur.
Calibration
Offset CA Calibration offset enables you to offset the input value from
-10
E to 10 E C or E F.
Table 4 GA0001 and 0002 PID Tuning Parameters
Parameters
FUNCTION
Display
Description
Upper Process Type Alarm UP If you do not want this alarm, set to highest
value.
Lower Process Type Alarm LP If you do not want this alarm, set to lowest value.
Upper Deviation Type
Alarm Ud If you do not want this alarm, set to highest
value.
Lower Deviation Type
Alarm lD If you do not want this alarm, set to lowest value.
Table 5 GA0000 Alarms
GA0001 and 0002 PID Tuning
Prompts appear for CH-1 with Code 0001, and then repeat
for CH-2 with Code 0002. Except for CA, these parameters
pertain directly to tuning your control to the system.
GA0000 Alarms
Prompts appear for CH-1, then repeat for CH-2. Refer to
the Watlow User's Manual for details.
Sequence repeats for Channel 2 and then leaves the
guarded area, returning to real time.