User Manual

Logical I/O blocks
Addressing the I/O blocks
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In Desigo, they are as follows:
● Physical I/Os
● Values in a Desigo room unit, accessible via the PPS2 interface
● Data in the same or in another automation station, referenced by its Technical Designation and
accessed without a connection, peer-to-peer via BACnet services.
Address prefix
The addressing syntax indicates the origin of the raw value. The syntax must correlate with the actual
physical inputs.
The prefixes for the various subsystems are as follows:
● "T=" for TX-I/O modules on an island bus-capable automation station PXC....D
● "C=" for on-board I/Os of the Desigo PX compact automation stations
● "B=" for referencing to BACnet objects
● "Q=" for QAX room units
● "L=" for LonWorks addressing
● "M=" for PX-OPEN addressing
● "D=" for PX Open Diagnostic Addressing
For addressing with "P=", see
Addressing Entries for PXC…-U, PTM and P-Bus .
For addressing with "S=", "M=" and "D=", see the corresponding expert documentation.
For more information on TX-I/O, see
TX-I/O Assortment overview (CM2N8170) and TX-I/O Functions and
operation (CM110561).
Addressing entries PX Modular (PXC100/200..D)
For PX compact, the TX-I/O module at the [IOAddr] pin start with a "T" (prefix: "T=").
Address syntax:
T= Module.I/O point (signal type)
Example: T=2.1 (Y10S)
The parameters no longer appear in the I/O address string for direct island bus integration, but rather in
the IOC (I/O configuration).
The only exception is the Info LED which must have the prefix "C=", because the fixed address, 8.1, which
is used for the Info LED may also be used by an I/O module.
The Info LED for PX KNX and PX Open can also be addressed with C=8.1.
Required address entries when using the modular series automation station in
conjunction with TX-I/O-I/O modules
Signal types shown in
italics are used to map virtual modules for use with TX OPEN at module level. Signal
types AIS, AOS, DIS and DOS deliver a 16 bit value with status information, while signal types AISL, AOSL,
DISL and DOSL deliver a 32 bit value with status information. All other signal types deliver a 16/32 bit
value without status information.
While all the module types listed may be connected to any island bus addresses, not all module types have
16 points.
Type Module addressing I/O point
Desigo TX-I/O 1...120 1...16
PX Info LED 8 1
Module type Signal type Example
Analog Input R1K, P1K, P100, U10, I25, I420
R2500, R250 (only TX-I/O)
T1, NTC10K, NTC100K (only TX-I/O)
T=1.1 (R1K)
AI, AIS, AIL, AISL T=2.1 (AIS)
Analog Output Y10S T=2.1 (Y10S)