Hardy Process Solutions HI 2160RC PLUS, Operation And Installation Manual

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HI 2160RC
PLUS
MANUAL
8-18
Setting the
Continuous
Operation Mode
• The Continuous Operation Mode allows the user to continuously
dispense from the feeder until instructed to stop by the operator or
the host controller.
Step 1. Press the Set Pt button.
Step 2. Enter the security code number.
Step 3. Press the Enter button. The Set Point Menu appears.
Step 4. Press the down arrow
↓
until the cursor is to the left of the
Amount sub-menu.
Step 5. If the Amount sub-menu is set to Continuous, press the Exit
button to return to the operating display.
Step 6. If the Amount sub-menu is set to a value, press the Select but-
ton to select "Continuous". (See Fig. 8-20)
Step 7. Press the Enter button to accept the selection.
Step 8. Press the Exit button to return to the operating display.
NOTE: When using the Continuous Mode, the batch process runs until told to stop by the host
or the operator.
Ratio Control (Master/
Slave)
Description of a
Ratio Controlled
System • The Host Controller monitors and/or controls the flow rate of the
main ingredient (Ingredient #1). The process requires that ingredi-
ent #2,#3,#4 etc. be fed into the main ingredient or vessel at a cer-
tain percentage (proportion) of the flow rate of ingredient #1.
• For example, if ingredient #1's flow rate is 10 gallons/
minute and the process requires that ingredient #2 be fed
at 10% of the flow rate of ingredient #1; ingredient #2
must be fed at a flow rate of 1 gallon/minute (a 10/1 ratio).
However, ingredient #1's flow rate is not constant. The
rate controller for ingredient #2, must maintain the 10%
proportional feed rate no matter what the flow rate of
ingredient #1 may be.
Ratio Process
Control System (See
Fig. 8-22) • The Host Controller is fitted with an Analog Output Option card
that generates a 0-5 VDC, 0-10 VDC, or 4 to 20 milliamp output
signal that is proportional to the actual flow rate of ingredient #1.
• The Slave Controller is fitted with a Remote Set Point Analog Input
Option card to receive a 0-5 VDC, 0-10 VDC, or 4 to 20 milliamp
signal. The slave controller receives the signal from the host and
adjusts the output signal to the feeder motor to maintain the 10%
(10/1 ratio) flow rate of ingredient #2.
• The flow rates of all ingredients can be monitored by Host (PLC or
Computer). If an Allen-Bradley PLC5 is used this data can be con-
tinuously transferred via Discrete Transfers or upon request via
Block Transfers.
• New desired flow rates should not be continuously transferred to
the Rate Controllers via the Remote I/O. When new rate informa-
tion is received, existing rate information in memory is written over