Data Sheet for Product

Siemens Building Technologies, Inc. Page 5 of 8
operators may also access the controller through
concurrent Telnet sessions and/or local operator
terminal ports.
Menu Prompted, English Language
Operator Interface
The Power MEC has a simple, yet powerful menu
driven English Language Operator Interface that
provides, among other things:
• Point monitoring and display,
• Point commanding,
• Historical trend collection and display for multiple
points,
• Event scheduling,
• Program editing and modification via Powers
Process Control Language (PPCL),
• Alarm reporting and acknowledgment, and
• Continual display of dynamic information.
Built-in Direct Digital Control Routines
The Power MEC provides stand-alone Direct Digital
Control (DDC) to deliver precise HVAC control and
comprehensive information about system operation.
The controller receives information from sensors in
the building, processes the information, and directly
controls the equipment. The following functions are
available:
• Adaptive control, auto adjusting closed loop
control. Provides more efficient, adaptive, robust,
fast, and stable control than the traditional PID
control algorithm. Superior in terms of response
time, holding steady state, and minimizing error,
oscillations and actuator repositioning
• Closed Loop Proportional, Integral and Derivative
(PID) control
• Logical sequencing,
• Alarm detection and reporting, and
• Reset schedules.
Built-in Energy Management
Applications
The following applications are programmed in the
Power MEC and require simple parameter input for
implementation:
• Peak demand limiting,
• Start-Stop time optimization,
• Equipment scheduling, optimization and
sequencing,
• Temperature compensated duty cycling,
• Economizer control,
• Night setback control,
• Automatic Daylight Savings Time switchover,
• Temporary schedule override,
• Holiday scheduling,
• Calendar-based scheduling, and
• Event scheduling.