Yaskawa iQpump Controller User Manual - Manual (Page 262)

262 YASKAWA TM.iQp.06 iQpump Controller User Manual
G.10 First In First Out (FIFO) Description
G.10 First In First Out (FIFO) Description
The following is a summary of a set-up procedure and application examples included in this section.
• FIFO Description
◆ iQpump Drive Alternation Parameters
■ Definitions
• First Drive: U1-62 = 1
• Last Drive: U1-62 = number of pumps running (Lead iQpump drive)
• FIFO: First In, First Out - First iQpump drive is alternated
• LIFO: Last In, First Out - Lead iQpump drive is alternated
Note: In either FIFO or LIFO, the replacement iQpump drive always becomes the new Lead iQpump drive
■
Related Parameters
Parameter
No.
Addr.
Hex
Parameter Name
Digital Operator
Display
Description
Setting
Range
Factory
Setting
Menu
Location
P9-03

0882
Alternation Time
Alternation Time
Specifies the time for a drive to request alternation, influenced by the Alternation
Mode P9-04. The request to alternate is made after this time expires. Active on the
First Drive for FIFO modes, and cumulative on the Lead drives for LIFO mode.
0 ~ 1000 h 24 h Programming
P9-04 0883
Alternation Mode
Alternation Mode
Determines how alternation is performed:
0: FIFO Auto: first iQpump drive is removed and there is no replacement unless it
is the only iQpump drive
1: FIFO Forced: first iQpump drive is removed and a new Lead iQpump drive is
brought on
2: LIFO: Lead iQpump drive is alternated with a new Lead iQpump drive
3: FIFO at Sleep: first iQpump drive is removed only when going to sleep
0 ~ 2 0 Programming
Parameter
No.
Addr.
Hex
Parameter Name
Digital Operator Display
Description
U1-68 0009C Time to Alternate
Time to Alternate
Time remaining before a drive requests alternation, which is dependent on P9-04. Pump requests for
alternation when this shows 0 min.