Tune Or Tune At Setpoint Program; Proportional Cycle-Time; Cycle-Time Recommendations; Second And Third Setpoints (Sp2 And Sp3) - CAL Controls 9500P Manual De Usuario

AUTOTUNE (continued)
Hereafter in the Manual the symbol (
for 3 seconds to ENTER or EXIT Program mode.

TUNE OR TUNE AT SETPOINT PROGRAM

Enter program ( ) and from the display tunE : oFF press and hold
display tunE : on or tunE : At.SP Exit program mode (
The TUNE program will now start. The display will show tunE as the process variable
climbs to setpoint.
Note: Avoid tuning while running a program as SP1 may be different from the target
setpoint..
When the TUNE or TUNE AT SETPOINT program is complete the PID values are entered
automatically . The process will rise to setpoint and control should be stable. If not, this may
be because optimum cycle time is not automatically implemented. T o set the cycle time
see PROPORTIONAL CYCLE-TIME.

PROPORTIONAL CYCLE-TIME

The choice of cycle-time is influenced by the external switching device or load. eg.
contactor , SSR, valve. A setting that is too long for the process will cause oscillation and a
setting that is too short will cause unnecessary wear to an electro-mechanical switching
device.
Factory set
T o use the 20 sec factory set cycle-time no action is needed whether autotune is used or
not.
To Manually Select AUTOTUNE Calculated CYCLE-TIME
When AUTOTUNE is completed, enter program (
display will read CYC.t : 20 (the factory setting).
T o view the new calculated optimum value, press and hold both
indexing stops. The calculated value will be displayed eg. A16 . If acceptable,
( ) to implement this setting.
To Pre-select Automatic Acceptance of AUTOTUNE Calculated CYCLE-TIME
Before AUTOTUNE is initiated select CYC.t in Level1, press and hold both
until indexing stops at A – – . Exit program (
To Manually Pre-select Preferred CYCLE-TIME
Before AUTOTUNE is initiated select CYC.t in Level 1, press and hold both
buttons until indexing stops at preferred value then exit program (

CYCLE-TIME RECOMMENDATIONS

Output Device
Internal relays
Solid state drives
) signifies both buttons are held pressed
and press to
).
) and select CYC.t in Level 1. The
and buttons until
exit program
and buttons
) to accept calculated value automatically .
and or
) to accept.
Factory Setting Recommended Minimum
20 seconds 10 seconds
0.1 seconds
20 seconds
SECOND AND THIRD SETPOINTS
PRIMARY ALARM MODES
Configure SP2 output to operate as an alarm from SP2.A in Level 2 and set the alarm
setting in SEt.2 Level 1.
Configure SP3 alarm mode SP3.A and setting SEt.3 in Level A. The alarms will be
individually triggered when the process value changes according to the options listed
below .
Rises above the main setpoint by the value inserted at SEt.2/3.
dV.hi
Falls below the main setpoint by the value inserted at SEt.2/3.
dV.Lo
Rises above or falls below the main setpoint by the value inserted at SEt.2/3.
BAnd
Rises above the full scale setting of SEt.2 or SEt.3.
FS.hi
Falls below the full scale setting of SEt.2 or SEt.3.
FS.Lo
Event Output (See Programmer section pages 11 to 18)
EoP
SUBSIDIARY SP2 / SP3 MODES
The following additional Subsidiary alarm functions can be added to any Primary alarm
configurations using the settings found at SP2.b in Level 2 and SP3.b in Level A.
Once activated, the alarms will latch and can be manually reset when the alarm
LtCh
condition has been removed.
This feature inhibits alarm operations on power -up and is automatically disabled
Hold
once the process reaches the alarm setting.
Combines the effects of both LtCh and hoLd and can be applied to any Primary
Lt.ho
alarm configuration.
SECOND SETPOINT (SP2) Proportional control output
Configure in Level 1 using CyC.2 to select proportional cycle time and bnd.2 to adjust
proportioning band. For Heat/Cool operation see Operating Manual.
Additional in depth information on controller operation is available in the CAL 9400.PDF
available for down load from www .cal-controls.com
In on–off mode, bnd.2 adjusts SP2 hysterisis.
Alarm type On-Off operating mode SP2 and SP3 Proportional operating mode SP2 only
Output state LED state
Deviation
DV.HI
DV.LO
BAND
Full scale
FS.HI
FS.LO
T emperature above setpoint
COOL
Strategy
(SP2 and SP3)
Legend
Output state LED state
Output ON
(Relay or SSd
energised)
: on-off mode only
BAND
Output OFF
(Relay or SSd
de-energised)
LED ON
5