User Manual

Logical I/O blocks
Addressing the I/O blocks
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Many systems include a requirement for the multiple use of sensors. A typical
example of this is an outdoor air temperature sensor shared across systems.
The following example illustrates the simplest form of the multiple use of
sensors:
In CFC the current value is transmitted for further use in the program by
interconnecting the blocks. The logical I/O block (Analog Input, {AI}) occurs in
the program once only, and its hardware-specific parameters only need to be
set once.
The multiple use function can be implemented with a BACnet reference to the
first analog input block (Partial plant 1). In other words, the first block will
receive the island bus address at the [IOAddr] pin. The second analog input
block (Partial plant 2) references the first AI (B=…) via the technical
designation.
Addressing multistate I/Os
The multistate value is made up of several separate binary measured values.
Addressing is via the input/output address [IOAddr]. In both the modular and
the compact series, the logical and physical I/O must be "located" in the same
automation station, but they do not need to be contiguous (e.g.,
C=5.1;5.3;5.5;5.6(Q250) is valid). The addressing cannot extend across
automation stations. The addresses must be on the same module for TX-I/O.
For information about adressing multistate I/Os with PTM, see
Addressing
Multistate I/Os with PTM
.
Syntax: T=Module.I/O point;Module.I/O point;Module.I/O point;Module.I/O
point
Examples:
● T=1.1
● T=1.1;1.2
● T=1.1;1.2;1.3
● T=1.1;1.2;1.3;1.4
● T=10.3
Up to four binary status values (e.g., Off/St1/St2/St3/St4) can be registered.
The signals to be registered, which are addressed via Module.Channel, must
always be of the same hardware signal type. With the simple mapping
I/O module
Block
1
0
6
6
4
-
2
4
z
0
3
e
n
Analog input
T
Solution 1
Solution 2
Multistate input
Simple mapping