Operating Instructions

Chapter 3—Applications
Customized Applications
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118
Siemens Industry, Inc.
Owner's Manual
553-104
Building Technologies
2018-10-01
Customized Applications
Some PXC Compact Series applications are created in the Powers Process Control
Language (PPCL). These applications use PPCL statements and additional hardware
to perform customized operations or functions in your system. Examples of
applications created in PPCL include:
● Duty Cycling
● Enthalpy and Dry Bulb Economizer Control
● Peak Demand Limiting (PDL)
Information on how to customize these applications for your facility is included in the
APOGEE Powers Process Control Language (PPCL) User's Manual (125-1896) and
the APOGEE P2 ALN Field Panel User's Manual (125-3019) or the APOGEE BACnet
ALN Field Panel User's Manual (125-3020). These manuals are available from your
Siemens Industry representative.
SNMP
The Simple Network Management Protocol (SNMP) Agent is a firmware feature that
has been added to BACnet Firmware Revision 3.2.3 and later. The SNMP Agent
allows points in the field panel to communicate with an SNMP manager over Ethernet.
SNMP is an application layer protocol that facilitates the exchange of management
information between network devices. It is part of the Transmission Control
Protocol/Internet Protocol (TCP/IP) suite. SNMP enables network administrators to
manage network performance, find and solve network problems, and plan for network
growth.
Three versions of SNMP exist: SNMP version 1 (SNMPv1), SNMP version 2
(SNMPv2), and SNMP version 3 (SNMPv3). All three versions have a number of
features in common, but SNMPv2 offers enhancements such as additional protocol
operations. SNMPv3 offers additional enhancements to Internet security and
communities.
SNMP users UDP ports 161 and 162, which must be opened within the firewall
settings.
The panel may coldstart after the SNMP license is loaded.
For more information, see the SNMP Agent Quick Start Guide (140-0891).