Yaskawa iQpump Controller Programming Manual - Manual (Page 212)

212 YASKAWA TM.iQp.07 iQpump Controller Programming Manual
Low Flow Fault Auto Restart: When parameter P6-07 = 3, the Low Flow Fault will be auto-restarted. It will use the time set in
parameter P6-08 before attempting another restart instead of the normal auto-restart time, L5-03. In order for this feature to work, L5-01
needs to be set to a value greater than zero.
Accumulated Level Output / Alarm / Fault: A total amount of water can be entered into parameters P6-09 and P6-10. When the
amount of water measured using A1 exceeds this amount, the drive will set the “Accum Level” digital output. If parameter P6-11 is set to
“1”, an Accumulated Level Alarm will display and the drive will keep running. If parameter P6-11 is set to “2”, an Accumulated Level
Fault will occur and the drive will coast to a stop.
Figure 1.162
Figure 166. Accumulated Output Flow Calculations
Sleep Function Using the Flow Meter: The Sleep function can be triggered by the Flow Meter. To enable this feature, the sleep level
type to be set to “FlowMtr-Term A1” (P2-01 = 4). Also the Flow Meter needs to be enabled by setting a non-zero value into P6-01.
The drive’s output needs to be active (faster than zero speed) for the time specified in parameter P6-06 before a sleep condition can be
detected. The flow will then have to drop below the P2-02 level for more than the P2-03 Sleep Delay Time for the drive to go to sleep.
Figure 1.163
Figure 167. Low Flow Alarm (P6-07 = 1)
How to calculatethe Accumulated Parameters P6-09 and P6-10
Step 1: Take the desired accumulated level and divide it by the number 65,535.
Step 2: Take the result of Step 1 and drop everything to the right of the decimal
place. This would leave just the whole number, and that should be
entered into parameter P6-10.
Step 3: Take the value you entered into P6-10 and multiply it by 65535. Subtract
this value from the desired accumulated leve. This is the number that
should be entered into parameter P6-09.
Desired accumulated level: 12,345,678
Step 1: 12,345,678 / 65,535 = 188.38297
Step 2: 188,38297 = 188
Set P6-10 = 188
Step 3: 12,345,678 - (188 x 65,535 = 25,098
Set P6-09 = 25098
Run
command
Restart
counter
Flow Rate
(Term A 1)
Output
Frequency
Low Flow
LOWFL
Alarm
1
P6-05
P6-06
P6-04
P6-05 P6-05
1 sec