PMSTR-6001
Plant Master
Touch-Screen
Guide
May 21
, 201
9
The Plant Master is a special stand-alone version touch-screen NXTSD104 which connects each Nexus
(PPC6000 or NX6100) to the screen via Ethernet hosting as many as 10 boilers. Each Nexus requires ei
ther, an NX6330 (12 key) Ethernet capable display or an NXTSD104 Touch Screen.
The normal ‘Overview’ button on the screen provides an overview of all connected systems, not just a single
boiler. It is possible to ‘drill down’ into any of these and access it as if the plant-mater screen was a locally
connected touch-screen. In fact, even though the Nexus may only have an NX6330 (12 key) keypad, the
operator will have the look and feel of the NXTSD104. Certain TSD104 functions will not be available unless
the Nexus has an NXTSD104.
The plant-master system incorporates boiler sequencing of up to 10 boilers. When used as a sequencing
master, the operator can select the lead boiler, limit the modulation of any boiler as well as remove a boiler
from the sequence. There are also provisions for re-configuring the boiler sequence without having to enter
the changes at each individual Nexus.
Another feature of the Plant Master sequencing is “Optimum Modulation”. This feature attempts to match
the minimum number of boilers to the present load. The operator inputs a value that represents each boilers
contribution to the total plant capacity along with the approximate burner turn down . The operator also
enters a value that represents the “optimum” firing rate for the boilers on average. This optimum value
effectively limits the mod rate until the operating boilers can’t meet the load demand, then overrides itself
allowing the boilers to modulate to their maximum input. This feature reduces unnecessary stress on the
boiler rear door, wall and tube sheet thus reducing maintenance cost.
DESCRIPTION
