User Manual

Application
The PXM20-E operator unit ensures the convenient display and operation of Desigo PX
automation stations via BACnet network communication. The graphics-based display
with clear text and direct access via the keyboard ensure a most user-friendly
operation.
Functions
All values visible in the system can be displayed in accordance with the defined
operator profile. Typical displays:
• Display of current values
• Setpoint and parameter settings
• Maintenance and error messages
• Alarm lists and single alarm messages with acknowledgement option and/or reset
• Time schedulers (7-day schedules and exception programs)
• Plant switching
• Login and password inputs
An integrated collective alarm message system with acoustic and visual indication is
provided.
As the PXM20-E operator unit is designed for end-user operation the operating concept
concentrates on the simplest and clearest possible display following intuitive operating
principles rather then displaying as many values as possible.
• Any text is displayed as clear text in the chosen language.
• To ensure a clear orientation for any operator the two top display lines (header lines)
always show which building services system or which function is currently in
operation.
• The basic concept of the operation ensures that it is always possible to select direct,
with the click of a button on the keyboard, the plant information shown on the
relevant line (direct access keys).
• Any settings or modifications (for example in graphics) can be followed direct on the
display (e.g. graphics display for scheduler).
• The basic concept also ensures that all information and help functions can be called
up any time (info key).
The functions of the PXM20-E are described in detail in the User's guide,
PXM20/PXM20-E operator unit, document CM110754.
Operating concept
User's guide
Indicators and operator
controls
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Siemens Operator unit PXM20-E CM1N9234en_04
Building Technologies 2015-01-06