User Manual

Logical I/O blocks
Addressing the I/O blocks
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The logical I/O blocks are designed for universal use in various I/O systems.
The specific address structures and hardware definitions are determined by the
I/O system, e.g., the failsafe control value for the island bus.
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