2 example 2, Example 2 – Rice Lake 320IS Plus Intrinsically Safe Digital Weight Indicator - Installation Manual User Manual

Page 65

320IS Plus Installation Manual - Setpoints

Setpoint 4 is used to dispense material from the hopper. When the hopper weight falls to 100

less than its

weight at the relative setpoint (setpoint 3), digital output 1 is set off.

SETPOINT=4
KIND=–RELSP
VALUE=100
TRIP=LOW
BATCH=ON
DIGOUT=1
RELNUM=3

Setpoint 5 is used to evaluate the gross amount of material in the hopper after dispensing, and to maintain a

minimum material level in the hopper. When the hopper weight falls below 300

, digital output 2 becomes

active and the hopper is refilled to 1000

SETPOINT=5
KIND=GROSSSP
VALUE=300
TRIP=HIGHER
HYSTER=700
BATCH=ON
DIGOUT=2

Setpoint 6 is used to ensure that the operation performed in setpoint 4 is completed within 10 seconds. The

START and END parameters identify the setpoints monitored by the timer. If the timer expires before setpoint 5

starts, digital output 4 is turned on as an alarm to signal a process fault.

SETPOINT=6
KIND=TIMER
VALUE=100
START=4
END=5
DIGOUT=4

Using the ACCESS Parameter

The ACCESS parameter should be set ON when creating and testing batch routines. Once the batching routine is

complete and ready for production, ACCESS can be set to OFF to prevent changes to the configured setpoint

value, or to HIDE to prevent changing or viewing the value.
Setpoints with ACCESS=ON can be turned ON or OFF and the setpoint value can be changed when a batch is

not running by doing the following:

• To turn the setpoint off, use the

SETPOINT

key to access the setpoints and press the PRINT key until the

desired setpoint is displayed. If the setpoint is on, the lb LED will be lit. Press the

CLR

key to turn the

setpoint off

• To turn the setpoint on, use the

SETPOINT

key to access the setpoints and press the

key until the

desired setpoint is displayed. If the setpoint is of, the lb LED will not be lit. Press the

CLR

key to turn the

setpoint on

• To change the value of a setpoint, press the

SETPOINT

key to access the setpoints, press the

key until

the desired setpoint is displayed. Press the

GROSS/NET

key twice. Enter the new value (including the

decimal point) and press the TARE key. Press the

ZERO

key twice to return to the normal mode.

Setpoints cannot be turned on or off while in a batch sequence. A setpoint value cannot be changed while in
a batch sequence.

7.2.2

Example 2

The following example uses seven setpoints to control a two-speed fill operation where both fast and slow feeds

are on simultaneously.

Note