Toptech Systems MultiLoad II User Manual

Chapter 6 – Additive Control
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Firmware Version 3/4.31.37
When an injection is commanded, the piston must leave its starting position before the Throw Time has elapsed.
The Piston Input (feedback switch) should indicate a change of state when the piston has been launched. The
default state is high when the piston is in the starting position, changing to a low state as the piston travels away
from its seat. If the Piston Input signal changes to a low state before the Throw Time elapses, the Throw Time
timer is reset, pending a command for the piston to return. If the state does not change within the Throw Time, a
missed injection will be logged internally. The load can be programmed to raise an alarm after a number of
missed injections are logged.
When the Throw Time has elapsed, the additive output (injection) signal will be removed, permitting the piston to
return to the starting position. After the output signal has been removed, the Throw Time timer is restarted. The
piston must return to the starting position before the Throw Time has elapsed. If the piston returns to its starting
position before the Throw Time elapses, the state should change to a high condition. The system would assume
that the injection was successful and it would increment the additive totalizer by the quantity specified in the
Volume per Injection parameter. If the signal did not change to a high state before the Throw Time elapsed, a
missed injection would be logged internally. The system will immediately attempt another injection, assuming that
the previous attempt delivered no additive. When the number of missed injections equals the value entered for the
Max Pstn Missed Inj (Maximum Piston Missed Injections) parameter, an Injection Fault alarm will be raised and
the load will be stopped.
If the piston has successfully returned to its starting position, as determined by the feedback signal, the piston will
sit idle until another injection signal is received from the additive output port. Another injection command signal
shall be sent to the injector when the demand for additive, based on product delivery, becomes 50% of one
injection volume.
6.5.4 CONFIGURING A PISTON WITH INPUT ADDITIVE
This topic describes the minimum configuration required to get an additive to operate using this method.
Configuration of the following parameters is mandatory. Using the MultiLoad II Configuration Tool or the Remote
Control Unit keypad in Program mode, select the preset and additive desired.
Parameter
Action
Additive Enable
Enable this parameter.
Additive FCM#
Set this value to the FCM # where the additive is connected.
Set this value to zero for the internal I/O board.
FCM Port #
Select the port that will serve as the Additive Injection Output. Note: A
corresponding additive input port will automatically be assigned. See the
Additive Port Assignment description above.
Additive Type
Set this value to PstnNFB if the piston input is normally high (Normal
Feedback). Set to PstnIFB if the piston input is normally low (Inverted
Feedback).
Additive Volume Per
Injection
Enter the cylinder volume using the appropriate units.
Piston Throw Time
Enter the time in seconds that it will take for the piston to complete one
half of an injection cycle.
The remaining parameters that apply to this additive method are optional. They are used to set up alarming,
pump outputs and permissive inputs. Some of the remaining parameters affect how the additive is delivered at
different stages of the load cycle. All Additive configuration screens and parameter descriptions are found in the
‘General Additive Setup’ section that follows.

Toptech Systems MultiLoad II Specifications

General

Brand	Toptech Systems
Model	MultiLoad II
Category	Control Unit
Language	English