Altronic DE-3000 - Page 16

DE-3000 IOI 7-17
All rights reserved © ALTRONIC, LLC 2017
16
Pressing NEXT again will reveal any further terminal board PID screens following
the same protocol for viewing, modifying and saving PID information. For CAS-
CADE RPM control and LINEAR/RAMP control, the control screens allow the
user to view the input and output values. In order to change the control strategy
for LINEAR/RAMP control, see section 15.6.
9.8 In addition to the two 4-20mA analog control loop outputs, the DE-3000 offers
a pulsed digital output control option on Digital outputs #1 and #2 for use with
solenoid valves or motor valves. This option is referred to as PULSE CONTROL
and allows for closed loop control of the variable measured by the analog voltage
measured by input channel 03. The pulse control is attached to channel 03,
allowing for three independent control loops. When PULSE CONTROL is used,
Digital output #1 is used to open a valve or to increase the output when it is ON.
Digital output #2 is used to close a valve or decrease the output when it is turned
ON. A decision of which output to activate and for how long is made once per
cycle. A maximum ON time limit is selected when programming the unit from
the PC Terminal Program. To change the control variables for PULSE OUTPUTS,
select EDIT CONTROL VALUES from main menu and press the ENTER key. The
edit control values menu is shown. Next, select EDIT CONTROLS. From the EDIT
CONTROLS screen, select EDIT PRIM. CONTROLS and press the ENTER key.
PRESS
TO EDIT
CONTROLS
ENTER
RUNNING
EDIT SETPOINTS
~EDIT CONTROLS
EDIT PID DEADBAND
CALIBRATION
PRESS
TO EDIT
PULSE
CONTROLS
ENTER
RUNNING
LINEAR/RAMP CONTROL
>EDIT PRIM. CONTROLS
PRESS TO
ACCEPT OR
GO TO NEXT
VALUE
ENTER
PRESS TO
CHANGE
VALUE
↑
UNITS
RUNNING
CONTROL 35.0 PSIG
CYCLE TIME ~ 2 s
PROP. BAND 40 %
DEAD BAND 0.5 PSIG
9.9 On some applications, in addition to all of the standard PID control tuning, it
may be desirable to allow for a small controller deadband in order to promote
system stability. To set or edit the PID deadband value, select this function from
the Menu as shown.
EDIT SETPOINTS
~EDIT PRIM. CONTROL
EDIT PID DEADBAND
CALIBRATION
EDIT SETPOINTS
~EDIT PRIM. CONTROL
EDIT PID DEADBAND
CALIBRATION
CONTROL 35.0 PSIG
CYCLE TIME ~ 2 s
PROP. BAND 40 %
DEAD BAND 0.5 PSI