GM9907-L5
bulk scale controller user’s manual
- 56 -
5.2
Expected Flowrate Function Description
When
“
Expected Flowrate
”
function is turn ON
，
when controller running will compute
the conversion based on the
“
Expected Flowrate value
”
and
“
Target
”，
Calculate the time
required to process a feeding process, then controller waits until the calculated time is up
before start discharge. If
“
Expected Flowrate value
”
is set to 0
，
input start will Alarm and
remind
“
Target Error
”
.
For example, Expected Flowrate
1000kg/h
，
Target
10kg
, the discharging process
should be completed 100 times per hour, and the time required for each discharging process
is 3600s÷100=36s. Then the controller will control the time of startdischarge last time and
the time interval of startdischarge this time is 36s
“
Flowrate Low Alarm
”
function if turn ON, then the controller will automatically
judge whether the discharging interval is greater than the calculated discharging interval
during operation. If the discharging time reaches "Flowrate Low Alarm Trigger Count" for
consecutive times, the controller will output Alarm signal. But the feeding process is still
normal. Alarm Prompt Alarm is automatically cleared after 3 seconds, or you can press
“
Clear Alarm” to Clear the Alarm.
“
Flowrate Low Auto Adjust ON/OFF
”
if turn ON
，
if controller detect discharge
overtime, the following balance controllers will try to shorten the discharge interval within
the range they can control and eventually cancel out the timeout time.
Take previous example discharge interval is
36s
，
if one feeding interval time is
40s
，
over
4s
, controller will adjust to shorten the time between discharge of the next balance
，
adjust it to 32s if allow. If only could shorten to
2s
up to
34s
discharge
，
then the controller
will use two 34s of discharge intervals to offset the 4s timeout.
Note
：
1.The controller calculates the number of discharge times per hour to calculate the
discharge interval. The number of discharge times is an integer. Therefore, the Expected
Flowrate and Target should not be too close, otherwise there will be a large error. For
example Expected Flowrate is 300kg/h, Target is 200kg, then discharge1.5 times per hour,
but only integer stored inside controller, The rounding will discharge 2 times per hour.
Thus resulting in a large error.
Expected Flowrate must be set no less than Target,
otherwise ControllerStart will prompt Alarm, cant’ turn ON.
2.Controller only calculates the time required by the discharge interval at start and does
not adjust the discharge interval according to the actual number of discharge per scale
during operation.
