Precision Digital PD6310 - Manual (Page 34)

Model PD6210 & PD6310 Batch Controllers Instruction Manual
34
Batch Control Operation Example
The following example shows how two stage batch control functions with
a PD6210 or PD6310. This setup will establish a 55 gallon preset for the
batch, with a main valve (high flow) that will close at 45 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 as-
signment 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
c;closing the valve controlling relay 2
five gallons before reaching the pre-
set.
… Assignment for optional relays 3-8.
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 3-8.
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.