ITT PumpSmart PS220, Руководство по конфигурации и эксплуатации

Страница: 166 / 300

PS220 Configuration & Operation Guide
165 PS220
Function & F
eatures
Lead-Lag Switching Definitions:
1. D2D Master: The PS220’s designation for the Lead pump. This can be referred to as the Lead Pump.
2. D2D Follower: The PS220’s designation for the Follower Pump. This can be referred to as the Lag Pump.
3. Pump Address:
This is the Physical Addresses of each of the drives connected together using the D2D connections on the drive.
Parameter 60.02. All PumpSmart PS220’s must have their individual D2D connections wired together sequen-
tially, or the system will not work correctly. See the Diagrams in the back of the manual. The Jumper Switches
(J3) must also be terminated as shown in this diagram as well to match how the connections were wired.
When the system is functioning The Master-Follower (Lead -Lag) designations are completely independent of
the PS220’s assigned address values.
Basic Theory of Lead Lag Switching
Alternation of the D2DMaster (Lead) to a D2D Follower (Lag) functionality on the PumpSmart PS220 in the
Multi-pump control mode is accomplished in one the following ways:
1. Individual accrued pump runtime.
The PumpSmart PS220 has an internal counter that accrues individual run-time when running in Multipump
mode. The running Master will transfer its status to the next “Available Follower” based on a time window
configured with parameter 81.31, “SWITCH LEAD TIME”. The default setting is 48 hours. This is not true clock
hours. It is accrued time of actually running. In theory, the next “Follower” in the sequence of Pump Addresses
1-2-3-4, etc. should be the pump that the lead status would be switched to. The PS220 has additional logic
that will equally balance the runtime of all D2D Follower (Lag) pumps. As such the “Available” D2D Follower
pump with lowest accrued run time will become the next D2D Master.
Parameter 81.41 “FOLLOWER SWITCH FACTOR” can be used to balance lags pumps with significantly “un-
equal” run times.
The runtime for each of the Pumps under control of the Multipump Functionality can have its runtime hours
reset by manually with the use of Parameter 81.23. Changing the setting to “On” automatically resets the
hours to zero and changes the setting back to “Off”.
Notes:
1. “Available” is defined as any “Follower” Pump in sequence with a “Start Received” status. This status is visi-
ble in parameter 1.233 and is displayed on one of the MultiPump home screens. See below:
2. The next pump in sequence may not be the next one to be switched to. The Multipump internal counter
works independently from the drives operating hours displayed in parameter 1.224 until the software sees that
all of the run times have equaled out.