Operating Instructions

Chapter 1—Introduction
Principles of Field Panel Operation
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118
Siemens Industry, Inc.
Owner's Manual
553-104
Building Technologies
2018-10-01
● Checks the current time once per second.
– Between 5:00 P.M. and 7:00 A.M., the fan remains OFF.
– Between 7:00 A.M. and 5:00 P.M., the control program checks the current
value of the temperature and sends the appropriate ON or OFF command to
the fan starter.
If the ON command is issued, the PXC Compact updates the value of the starter point
in its memory to reflect the current state of the fan.
System Program
The PXC Compact contains a non-volatile system program called firmware , which can
be upgraded in the field. The firmware is stored in Flash ROM memory, which keeps it
virtually immune to all forms of power fluctuations or failure, including battery failure.
For more information on Flash ROM memory, see Memory [➙ 37].
General functionality of the firmware includes:
● Executing control programs.
● Communicating between other field panels and the workstation.
● Monitoring points.
● Managing point-related information.
● Keeping track of real time (both clock and calendar time).
● Executing self-test and error detection in the PXC Compact.
License Manager
License Manager adds applications or functionality to a field panel without the need to
replace the hardware or perform a firmware flash. Field panels with Firmware Revision
2.8.2/3.0.1 or later support the License Management attribute.
Contact your Siemens Industry representative for more information on applications and
functionality that can be activated through License Manager.
License Manager Definitions
● A feature is an application or additional functionality that can be added to a field
panel without the need to replace the hardware. Some features require a firmware
flash.
● A
license is the code provided by Siemens Industry to unlock a feature.
● The
ID_STRING is a unique identifier that distinguishes an individual piece of
hardware. It is composed of the panel's part number, revision, year and week of
manufacture, and serial number. Therefore, a license for one field panel will not
work on another field panel.
● An
Entitlement contains the license(s) ordered.
● An
Entitlement ID is the SAP Purchase Order number or Reference number from
the Advanced Shipping notice and your 3 character organization code.