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Introduction
The H2P Series drives with Pump software have an Application Group (AP1) of parameters that includes
parameters to program the drive(s) to control multiple motors. Some of the multiple motor control functions included
are Lead/Lag (with Fixed Lag or Follow Lead), Alternation (FIFO & FILO settings), Staging and De-staging settings,
Run Priority (order) and Jockey Pump control. There is also a Macro Group of parameters (MC2 Group) that
includes parameters for quick setup. All Lead/Lag methods described below utilize PI Control requiring as a
minimum, the Lead drive to receive a feedback signal of the process variable (pressure, level, etc.). The MC2 Group
also includes setup of basic PI control parameters.
There are four (4) methods to control multiple motors. Each is described in more detail below. To view parameters
related to Lead/Lag, select “Lead Lag Sel” at the Quick Start menu or at parameter CNF-43. See
Section 5
. This will open the AP1 Group and create the MC2 Macro Group which includes the majority of
Lead/Lag parameters required for quick setup.
The four (4) methods of multi-motor control are:
(1)
Contactor Lag
(2)
Follow Lead
(3)
Fixed Lag
(4)
Network Fbk
1.1
Lead/Lag Descriptions
•
Contactor Lag
- Utilizes one
Main
drive along with relay logic to control ATL contactors or starters (referred
to as
AUX
motors). A single drive can control up to five (5)
AUX
motors (8 with Ext. IO Card) via output
relays from the
Main
drive. The relays are programmed to add/remove additional
(AUX)
motors as needed.
This is for a single drive only, not multiple drives. Contactor Lag (MMC) operation is covered in a
supplemental manual that describes this method in more detail.
•
Follow Lead
- Utilizes one Main drive and Lag drives that
operate at the same frequency (follow)
as the
Main PI controlled drive. A Lead drive (designate by
“+”
) controls all communications to the Lag drives. A
Lead/Lag system can incorporate up to five (5) LAG drives (8 with Ext. IO Card). Follow Lead can be
operated with a single transducer to the Lead (+) drive or with feedback provided to all drives in the
Lead/Lag system.
•
Fixed Lag
- Utilizes
one Main drive and Lag drives that
operate at a set speed (fixed frequency).
A
Lead drive (designate by
“+”
) controls all communications to the Lag drives. A lead/Lag system can
incorporate up to five (5) LAG drives (8 with Ext. IO Card). Fixed Lag can also be operated with a single
transducer to the Lead drive or with feedback provided to all drives in the Lead/Lag system.
•
Network Feedback
- Setting for Lag drives only that are not receiving a feedback signal. Lag drives operate
in accordance with Lead (+) drive setting (Follow Lead or Fixed Lag). Lag drives set to Network Feedback
cannot become a Lead (+) drive and thus a transducer connection is not required.
Summary of Contents for RSi H2P Series
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