82
1MRS755225
Transformer Terminal
Technical Reference Manual, General
RET 54_
lonlog_b
Fig. 5.1.13.11.-1Principle of connecting LON inputs and outputs to logic functions
of the transformer terminal
Each SNVT_state network variable can be used to communicate either an integer
value in the range of 0-65535 or up to 16 Boolean values as a binary coded number.
The type conversion function BOOL2INT is useful for packing and INT2BOOL for
unpacking the binary coded variables. Each bit indicates the state of the Boolean
value with, for example, the following interpretations:
The communication inputs and outputs are seen in the relay configuration tool as
global variables:
where x is a number from 1 to 32. Similar names are used in the LON Network Tool.
The basic operation principle is that every time the output value is changed by the
configuration, the new value is propagated automatically over the LON network
to all communication inputs that are bound to the output. The network variable
connection can be from a single source to one or many sinks. An output can also
be unbound, i.e. it is not transmitted to LON network at all. Also an input can be
unbound, i.e. no updates will be accepted to this input.
0
1
off
on
inactive
active
disabled
enabled
low
high
false
true
normal
alarm
category
name
datatype
purpose
communication inputs (sinks) COMM_INx
COMM_INxIV
UINT
BOOL
input value
input invalidity flag, FALSE
indicates a valid state
communication outputs
(sources)
COMM_OUTx
UINT
output value
>1
nv16 nv16
nv16
I/O
REF 54_
>1
nv16 nv16
nv16
I/O
REF 54_
>1
nv16
RE_ 54_
SYS
LON
LON
RE_ 54_
>1
nv16 nv16
nv16
RE_ 54_
nv16 nv16
nv16
>1
nv16
nv16
Inter-
locking
Blocking
Open
enable
Close
enable
Close
Open
Reserve
Inter-
locking
Open
enable
Close
enable
Close
Open
Reserve
Inter-
locking
Blocking
Open
enable
Close
enable
Close
Open
Reserve
Select/Execute
Blocking
I/O
I/O
I/O