Helios Large Display Analog Input Batch Controller Instruction Manual
PD2-6210
26
Batch Control Operation Example
The following example shows how two stage batch control functions with a PD2-6210 controller. This
setup will establish a 55 gallon preset for the batch, with a main valve (high flow) that will close at 50
gallons, and a trickle valve (low or restricted flow) that will close at 55 gallons. After the batch, the preset
will be changed to 100 gallons.
Two-Stage Batch Control Setup Using Relays 1 & 2
The following table shows the parameters as they appear within the
Setup
menu entry
relay
.
Parameter
Setting
Function
Relay
Assign
Press Enter to enter the relay assignment parameters.
Asign1
total
Assign relay 1 to batch total control.
Asign2
total
Assign relay 2 to batch total control.
Precls
Total
Press Enter to access preclose
selection for multi-stage control.
Precls
Yes
Yes to enable a preclose value for relay 2.
Yes
00005..0
Set the preclose value to 5 for closing the valve controlling
relay 2 five gallons before reaching the preset.
…
Assignment for optional relays 3-4.
Rly 1
relay
Select relay 1 setup.
Act 1
rly 1
Configure activation of relay 1.
Act 1
Auto
Always set to Auto for batch control function.
Rly 1
Preset
Set the preset value for batch control.
Preset
00055.0
Set 55 gallons as the preset.
…
Setup for optional relays 3-4.
The operation of relay 2 has already been assigned for multi-stage control preclose, and will not appear
as a selection in the
relay
menu.
If only one stage batch control was desired, with one relay for control, then one would set the assignment
of relay 2,
assign2,
to off, rate, or grand total.
The following pages show an illustration of how the above settings control the batch operation. The
display assignment is the default.
Batch Control Operation
1. A new container is prepared for the batch. Both valves are closed. Note that the upper display may
show the batch total from the last batch.
2. The START button is pressed. Both valves open. The barrel begins to fill as the total being dispensed
is displayed in the big window. The lower window shows the rate and units, alternating.
3. When the batch total reaches 50 gallons, the preset (55) minus the preclose amount (5) for relay 2,
relay 2 deactivates to close the main valve. The barrel fills more slowly as a result, improving
accuracy.
4. When the batch total equals the preset, relay 1 deactivates, closing valve 1. Filling stops.
5. The BATCH button is pressed, and a new preset is entered, 100 gallons, and the enter/STOP button is
pressed to confirm it.
6. The new batch begins when the START button is pressed, so both relays activate and both valves
open.
Additional Features
At any time during the batch, the STOP button may be pressed to pause the batch. When paused, the
START button will continue the batch, and pressing the STOP button again will cancel the batch.
When in STOP mode, the STOP button may be pressed to cycle through alternative parameters to be
displayed on the lower display, including the grand total, batch count, and preset.
The grand total and batch count may be reset in the
reset
menu by pressing the MENU button and
entering the reset menu. It may also be reset with digital inputs.
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