Yaskawa iQpump Micro - Manual (Page 113)

• Check physical connections.
• Verify the H5-oo serial communication settings.
• Confirm the P9-25 and P9-27 settings on all the drives. P9-25 should be set to the highest H5-01 address and at least one
drive should have P9-27 set to 0.
• Cycle main power.
Multiplexing Principle
Always observed by system:
• New drives start as Lead and run in PID mode.
• Only the Lead drive can request staging and de-staging.
• Staging will start a new Lead drive and make the old Lead drive into a Lag drive.
• De-staging will stop the current Lead drive and restore the previous drive as the Lead drive.
Multiplexing Messages
During multiplexing, the drive will display a message when it will be staged in or de-staged out. The message will indicate if
it is being staged in or out and display a countdown timer of how long until the change takes place.
One of the following conditions must be met for de-staging to occur:
• High Feedback Quick De-stage
• Low Feedback Quick De-stage
• Normal De-stage
• Low Water Level De-stage
• Suction Pressure De-stage
Drive Run Order
U9-04, Running Queue No:
• Shows the position in the iQpump MEMOBUS running queue.
• U9-04 = 0 for pumps that are not running.
• U9-04 = 1 on the first pump that came on and is still running.
• U9-04 = 2 on the second pump that came on and is still running.
• U9-04 = the number of pumps running for the current Lead drive.
Multiplex Status Display
Table 4.10 Multiplex Status Display
Network State Display
Drive is not able to accept commands from
the iQpump MEMOBUS network because
the drive is not in AUTO Mode run.
Pump Off Network
- MODE - DRV RDY
Home
U1-02=
U1-91=
0.00Hz
62.8PSI
U5-99= 100.0
PSI
Drive is in AUTO Mode and waiting for a run
command from the iQpump MEMOBUS
network.
Wait for Net Cmd
- MODE - DRV RDY
Home
U1-02=
U1-91=
0.00Hz
62.8PSI
U5-99= 100.0
PSI
4.7 iQpump Presets and Functions
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual 113
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Start-Up Programming & Operation