Altronic DE-2500 - Pulse Control Using Digital Outputs; PULSE CONTROL with Digital Outputs #1 and #2

-17-
9.7 (continued)
The screens which will appear for LOOP #2, depending upon which program options are used,
are shown below.
or
CH31/91 42.3 PSIG
SETPOINT 42.2 PSIG
P:45% I: 1s D:450m
AUTO 58%
NEXT
press
twice
to view
CH31/91 1199 RPM
SETPOINT 1200 RPM
P: 45% I: 1s D:450m
AUTO 58%
NEXT
press
twice
to view
9.8 In addition to the two 4-20 mA analog control loop outputs, the DE-2500 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 30. On DE-2500 units above serial
number 1525 and programmed using terminal software 2.0, the pulse control is attached to
channel 32, 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. The arrow points to the “EDIT PRIM.
CONTROL”.
EDIT SETPOINTS
÷EDIT PRIM. CONTROL
EDIT PID DEADBAND
ENTER
press to
edit pulse
controls
CONTROL 35.0 PSIG
CYCLE TIME ÷ 2 s
PROP. BAND 40 %
DEAD BAND 0.5 PSIG

UNITS
press to
change
value
ENTER
press to
accept or
go to next
value