48
CLEAr. Press the
FUNC
key to restore the linear factory calibration of the span value. When the
legend
DSP.FL appears in the lower display, calibration is complete. Press
A/M
to return to the
operating screen.
7.2
S
TART
-U
P
AND
E
NGAGING
SMART
After Calibration of the Transducer to the Instrument, return to the main display. Press the
FUNC
key
until
0 shows in the upper display, and SP shows on the lower display. This is the pressure setpoint.
7.2.1 S
ETTING
THE
P
ROCESS
S
ET
P
OINT
Press the
▲
key until the process setpoint pressure shows on the upper display. Ensure that the
process is at operating temperature. Turn on the motor drive, and press the
▲
key to increase the
Output % until the drive system engages and begins running. Press the
▲
key to slowly approach
the set point pressure until the pressure stabilizes around the set point pressure.
7.2.2 E
NGAGING
SMART
Press the
FUNC
key until
nonE and GROUP show on the display. Press the
▲
key until
2 shows in
the upper display. Press the
FUNC
key and the lower display changes to
ZERO.C. Press the
FUNC
key until
SMART shows on the lower display and OFF shows on the upper display. Press the
▲
key
to turn the upper display to
ON, and enter with the
FUNC
key.
NOTE: Under NO circumstances should the SMART be engaged with the motor drive shut off. The
PID or PI loops will “wind up” until they are at the maximum value, and if the drive is
started in this condition, the drive will start at 100% speed. Damage to the drive and
peripheral equipment will result.
The SMART LED will flash and a countdown will begin as the controller determines its initial P and I
values. Return to the main screen and observe that the value in the upper display is the actual value
you wish to control.
7.2.3 E
NGAGING
A
UTOMATIC
C
ONTROL
When the Smart LED has stopped flashing, press and hold the
A/M
key until the lighted legend
MAN goes out. The ATC770 is now in the Control Mode.
7.3
T
HE
T
UNING
M
ODE
When the SMART Tuning Algorithm is active, a series of computations takes place to calculate the
PID parameters. There are two tuning modes: The Tuning Algorithm and the Adaptive Tuning
Algorithm. Each works on a different concept that will be explained in their related sections.
Summary of Contents for ATC770
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Page 30: ...30 Fig 6 Remote Set Point Jumper Location Board E...
Page 84: ...NOTES...
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