DE-3000 IOI 7-17
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13
Proceed through the servicemeter messages to find the required service. The
number of hours left until the listed maintenance is due is displayed for each
service message. When the hours left reaches zero the
*
character is displayed
on the home screen status line.
F2
PRESS TO
RESET HOURS
REMAINING
↑
UNITS
PRESS TO
CHANGE
NUMBER
RUNNING
HOURMETER/VIEW/CLEAR
MESSAGE NUMBER: ~02
HOURS LEFT: 0
OIL CHANGE REQUIRED
There are up to eleven user programmable service messages. The desired mes-
sages and service intervals are selected when programming the DE-3000 sys-
tem. The service intervals can only be changed by using the terminal program
and the PC. The servicemeter alert can be reset after the required service is
performed by pressing the F2 key with the desired message displayed. Each
servicemeter message is individually reset.
9.7 CONTROL SCREEN
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 01. 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.
RUNNING
CH01/A01 42.3 PSIG
SETPOINT 42.2 PSIG
P:45% I: 1s D:450m
AUTO 58%
NEXT
PRESS TO
VIEW
The current values of the control loop can be viewed at any time, however, to
change these values, a specific key sequence must be entered first. To unlock
the control loop values, enter the password (see section 27.0). A small arrow will
appear next to the value to be changed. Use the arrow keys to change the value
and the ENTER key to accept the new value. As the ENTER key is pressed, the
controller will begin controlling to that value and the cursor advances to the next
value. To disable the optional automatic control and force the controller output
to a particular value after unlocking the control, press the F1 key. The display
will indicate that the unit is in MANUAL and the current value of the output. Use
the UNITS arrow keys to change the setpoint value.
HOURMETER / SERVICE
MESSAGE NUMBER: ~02
HOURS LEFT: 0
OIL CHANGE REQUIRED
CH01/A01 42.3 PSIG
SETPOINT 42.2 PSIG
P:45% I: 1s D:450m
AUTO 58%
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