-15-
9.6 (continued)
From the RUNNING home screen, the RPM SETPOINT CONTROL screen is accessed by
pressing the NEXT key twice. This home screen will display current speed control, AUTO or
MANUAL, and the status. There are three possible status messages displayed: HOLDING,
INCREASING, AND DECREASING.
NEXT
press
twice
to view
SPEED: AUTO
INCREASING
CHAN 46 1830 RPM
SPEED
F1
press to
change
mode
SPEED: MANUAL
HOLDING
CHAN 46 1830 RPM
SPEED
UNITS
press to
change
value
9.7 FOLLOW THIS SECTION FOR DE-2500 UNITS PROGRAMMED FROM TERMINAL
VERSION 2.0 OR ABOVE. FOR DE-2500 UNITS PROGRAMMED FROM TERMINAL
VERSION 1.8 OR BELOW, SEE SECTION 9.6. DE-2500 UNITS WITH SERIAL NUMBERS
ABOVE 1525 MAY BE PROGRAMMED USING EITHER VERSION OF TERMINAL
SOFTWARE, VERSION 1.8 OR 2.0.
From the home screen, the CONTROL LOOP #1 screen is accessed by pressing the NEXT key
once. CONTROL LOOP #1 is a closed loop PID controller which is assigned to the analog
value measured by channel 30. This can be virtually any pressure, temperature, valve position
or other equipment parameter which can be expressed as an analog value from 0 to 5 volts.
Some typical controlled values would be the discharge pressure of a compressor, the intake
manifold pressure of an engine, the temperature of a cooling system or the chemical
composition of a process output. The first line of the display will indicate the input
channel/output channel and the current value of the controlled parameter. The next line shows
the desired value, the setpoint, of the controlled parameter. The third line shows the current
settings of the loop tuning values; the P: 45% indicates a proportional band setting of 45%, the
I:1s indicates an integral term of 1 second, and the D:450m indicates a derivative value of 450
minutes.
CH30/90 42.3 PSIG
SETPOINT 42.2 PSIG
P:45% I: 1s D:450m
AUTO 58%
NEXT
press
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