Yaskawa iQpump Controller Programming Manual - Manual (Page 235)

YASKAWA TM.iQp.07 iQpump Controller Programming Manual 235
Table 112 Alarms
Table 113 Messages
◆ P9-03 Alternation Time
Setting Range: 0 ~ 1000 hr
Factory Default: 24 hr
Refer to parameter P9-03 in Appendix A for description details.
◆ P9-04 Alternation Mode
This parameter minimizes uneven run-times in a multi-pump system.
The First Drive is defined as the first pump that was run in the system (see MEMOBUS / Modbus Multiplex Diagrams 1 and 2: Run Order
/ Pump #). The Last Drive is defined as the Lead Drive.
Alternation can be requested by a drive when a specified time has expired. Two basic modes allow the timer to either run from the lead
drive (LIFO - Last In, First Out), or from the first drive (FIFO - First In, First Out). When the timer expires, the drive is removed from the
system and consequently turned-off, and a new lead drive is brought online to replace it. In FIFO, another mode (FIFO Auto) gives
control to the Multiplex system on bringing the new lead drive online.
Since the iQpump MEMOBUS / Modbus Network uses monitor U1-13 when P9-01 = 1 (Lowest Runtime), lead drive selection is thus
directly affected by o2-07 and o2-08. It is recommended to keep o2-08 = 1 (Running Time). It should be noted that when U1-13 goes past
65535 hours, it gets reset to zero.
■
Function Description:
<0034>
When the Alternation Time P9-03 (with unit based on P9-19) is not set to 0, the Alternation feature is enabled, and is based on the P9-04
(Alternation Mode) parameter. In FIFO, the timer is run on the first drive while in LIFO it is on the lead drive. When the timer expires, the
drive requests alternation based on the P9-04 setting and sends that information to the MEMOBUS / Modbus network.
Setting P9-04 to “0: FIFO Auto” will remove the first drive in the running queue and will start the lead drive automatically (if needed)
using the MEMOBUS / Modbus Multiplex function. If there is only one drive running, then the new lead drive is forced to run since the
MEMOBUS / Modbus Multiplex function can not run if there is no lead drive.
Setting P9-04 to “1: FIFO Forced” will remove the first drive in the running queue and will force a new lead drive to run.
Setting P9-04 to “2: LIFO” will remove the current lead drive and replace it with a new lead drive.
Alarm Display Description Cause Countermeasures
Analog FB Lost
Switched to Net
Analog Feedback has not been detected
and the Network PI Feedback signal is now
used.
Feedback level dropped below b5-13 for the time set in b5-14.
If the feedback source is
functional, change b5-13 or b5-14
to the correct level and time delay.
H3-09
≠
B (PI Feedback)
Set H3-09 = B (PI Feedback) if
the analog input source is to be
used for PI Feedback. Otherwise,
set P9-02 = 3 if the drive does not
have an analog PI Feedback
source
Defective or broken analog input source.
Check to ensure the PI Feedback
source is installed and working
properly. If there is
Message Display Description Cause Countermeasures
Network FB Lost
Check FB Source
Network PI Feedback has been lost No valid analog PI Feedback source can be found on the network. Check the feedback source on
drives configured as P9-02
≠
3.
Setting Description
0 FIFO Auto
1 FIFO Forced
2 LIFO
3 FIFO @ Sleep
4 LIFO @ Sleep