REM 543 Protection,
Monitoring and Control
Page 43
Technical Reference Manual
Part 1, General
ABB Network Partner
4.1.10.5.
LON inputs and outputs via a LON bus
The REM 543 machine terminal offers up to 32 freely programmable LON inputs and
outputs on the LON bus. The inputs and outputs use the LONMARK Standard network
variable (NV type 83 = SNVT_state) for sending and receiving process data. The LON
inputs and outputs are accessible in the machine terminal configuration and can be
freely used for different types of data transfer between REM 543 machine terminals and
other devices that are able to communicate using the network variable of type
SNVT_state. For more information refer to chapter “LON network configuration”.
Fig. 4.1.10.5.-1. Principle of connecting LON inputs and outputs to logic functions of
the machine terminal.
The SNVT_state can be used to communicate the state of a set of 1 to 16 Boolean val-
ues. Each bit indicates the state of the Boolean value with, for example, the following
interpretations:
The value field shows the current value of the binary inputs or outputs at the time of
reporting, or the last value reported from the concerned device.
The SNVT_state can be used to transfer the state of 1 to 16 binary inputs or it can be
used to set the state of 1 to 16 output bits or binary set-points.
0
1
off
on
inactive
active
disabled
enabled
low
high
false
true
normal
alarm
>1
nv16
nv16
nv16
I/O
REF 54_
>1
nv16
nv16
nv16
I/O
REF 54_
>1
nv16
I/O
RE_ 54_
SYS
LON
LON
RE_ 54_
>1
nv16
nv16
nv16
I/O
RE_ 54_
nv16
nv16
nv16
I/O
>1
nv16
nv16
lonlog
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