WattMaster WCC III part 14 - Manual (Page 23)

13B. WCC III - MCD2 INSTALLATION GUIDE
WCC III Technical Guide 13B-21
Functions of the WCCIII-MCD2
WCCIII-MCD2 Functions
The main function of the WCCIII-MCD2 is to provide a hardware
and software platform for a program that WattMaster Controls
has developed called “backtask”. The BACKTASK program is so
named because it is a multiple BACKground TASKing application
program.
The BACKTASK program does a lot of various functions such as:
USB communications to the internal MCOMM board, Time clock
functions, analog/binary global processing, overrides of control
points, Holiday scheduling, Optimal starts, PID programs, Shed /
Restore programs, Duty cycle programs, Proportional Programs,
Tenant Overrides, and Emailing of alarms. The BACKTASK
program also provides for remote IP connection to a set of
Windows-based programs generally referred to as the WCC III
programs.
If the BACKTASK program is not running on the WCCIII-MCD2,
there is a watchdog circuit on the WCC3 MCOMM board that will
automatically restart/reset the WCCIII-MCD2 within 3 minutes.
This watchdog circuit may interfere with the installation of new
BACKTASK software. There is a way to disable this watchdog
circuit. Please contact WattMaster Controls for further important
information on temporally disabling this watchdog circuit. A two
pin berg jumper that is labeled “SBC RESET” on the WCC3
MCOMM board enables (ON) or disables (OFF) this watchdog
circuit, but this jumper must be “ON” for normal operation, and
if this “SBC RESET” jumper is left “OFF” then the automatic
restart/reset function of the WCCIII-MCD2 is then inoperable, and
may cause future undesirable operating issues. Manual reset from
the CrystalFontz LCD interface is also enabled/disabled with this
jumper, too.
Again, great caution must be used to ensure that this “SBC RESET”
jumper on the WCC3 MCOMM board is set back to enabled (ON)
if it is ever disabled for any and all software installations that occur
in the fi eld. This enabling/disabling of the “SBC RESET” jumper
is not normally done for simple setting of the IP addressing.
This WCCIII-MCD2 also has hardware (WCC3 MCOMM board)
that interfaces to four isolated RS-485 communications loops
that then connects to various SAT III type controllers for building
automation controls.
The 24VAC@50VA power transformer for the WCCIII-MCD2 is
to be connected to a dedicated APC
TM brand UPS ( Uninterruptible
Power Supply) outlet so that the MCD will keep running during a
minor power outage. The Cable/DSL modem/router should also be
plugged into one of these dedicated UPS (Uninterruptible Power
Supply) outlets. Take note that the UPS may have several outlets
but not all are marked backup power. Some are surge suppression
only. Use the backed up power outlets.
TheWCCIII-MCD2 has the ability to monitor power status of
the UPS to control the shutdown of the WCCIII-MCD2 via the
supplied APC USB cable. These commands that are sent from an
APC
TM brand UPS (Uninterruptible Power Supply) upon detection
of loss of power will alert the WCCIII-MCD2 of power failure
that is then logged to the MCD’s SYSLOG fi le. The MCD will
monitor the UPS until there are 3 minutes of power remaining and
then initiate a shut-down of the WCCIII-MCD2. Upon resumption
of normal power, the WCCIII-MCD2 will power up on its own and
log the event in the SYSLOG of the OS.