Data Sheet for Product

PXC Compact Series
Programmable Control with Application Flexibility
4
Siemens Industry, Inc. 149-454
Smart Infrastructure 2020-05-20
Programmable Control with
Application Flexibility
The PXC Compact Series of high performance
controllers provides complete flexibility, which allows
the owner to customize each controller with the exact
program for the application.
The control program for each PXC Compact is
customized to exactly match the application. Proven
Powers Process Control Language (PPCL), a text-
based programming structure like BASIC, provides
direct digital control and energy management
sequences to precisely control equipment and optimize
energy usage.
Global Information Access
The HMI port supports operator devices, such as a
local user interface or simple CRT terminal, and a
phone modem for dial-in service capability. Devices
connected to the operator terminal port gain global
information access.
Multiple Operator Access
Multiple operators can access the network
simultaneously. Multiple operator access ensures that
alarms are reported to an alarm printer while an
operator accesses information from a local terminal.
When using the Ethernet TCP/IP ALN option, multiple
operators may also access the controller through
concurrent Telnet sessions and/or local operator
terminal ports.
Menu Prompted, English Language
Operator Interface
The PXC Compact includes 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
● Continual display of dynamic information
Built-in Direct Digital Control
Routines
The PXC Compact provides stand-alone Direct Digital
Control (DDC) to deliver precise HVAC control and
comprehensive information about system operation. It
receives information from sensors in the building,
processes the information, and directly controls the
equipment. The following functions are available in the
PXC Compact:
● Adaptive Control, an auto-adjusting closed loop
control algorithm, which provides more efficient,
adaptive, robust, fast, and stable control than the
traditional PID control algorithm. It is superior in
terms of response time and holding steady state,
and at minimizing error, oscillations, and actuator
repositioning.
● Closed Loop Proportional, Integral and Derivative
(PID) control.
● Logical sequencing.
● Alarm detection and reporting.
● Reset schedules.
Built-in Energy Management
Applications
The following applications are programmed in the PXC
Compact Series and require simple parameter input for
implementation:
● Automatic Daylight Saving Time switchover
● Calendar-based scheduling
● Duty cycling
● Economizer control
● Equipment scheduling, optimization and
sequencing
● Event scheduling
● Holiday scheduling
● Night setback control
● Peak Demand Limiting (PDL)
● Start-Stop Time Optimization (SSTO)
● Temperature-compensated duty cycling
● Temporary schedule override