Yaskawa iQpump Manual Supplement - Manual (Page 29)

10 iQpump MEMOBUS/Network Operation
YASKAWA TM.iQp.10 iQpump Technical Manual Supplement 29
10 iQpump MEMOBUS/Network Operation
‹ Lag Drive Speed Follower and Lag Turn Off
Certain multiplex pump systems require a common pump speed for all running pumps. To allow for this operation, a new
selection "Follow Lead Spd" is added to parameter P9-05.
„ Function Description
P9-05 Lag Drive Mode
Note: The rate at which the Lag drives follow the Lead drive's output speed is dependent on the communication speed of the iQpump
Controller network (H5-02), the maximum number of iQpump Controllers on the network (P9-25) and the current number of
iQpump Controllers online.
Display Message for Follow Lead Speed Operation:
When the iQpump Controller is operating in Auto Mode, Lag operation and the Follow Lead Speed function is active
(P9-05 = 3) then the display will show the actual frequency reference in Hz instead of the selected system units.
Setting Description
0
Fixed Speed (factory default)
Runs at the P9-06 setting after the P9-07 time expires.
1
PI Regulation.
Uses PI to determine speed.
2
Turn Off
The iQpump Controller stops running when it switches to a lag drive after P9-07 time expires.
3
Follow Lead Spd
The iQpump Controller follows the speed of the active Lead drive. Use P9-30 gain and P9-31 bias setting
to adjust reference signal.