Lon Inputs And Outputs Via A Lon Bus - ABB REM 543 Technical Reference Manual

ABB Network Partner
4.1.10.5.
REM 543 Protection,
Monitoring and Control

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".
nv16
nv16
Blocking
>1
Open
enable
Inter-
locking
Close
enable
Open
Reserve
I/O
Close
RE_ 54_
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:
0
off
inactive
disabled
low
false
normal
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.
Technical Reference Manual
SYS
Select/Execute
LON
nv16 nv16
nv16 nv16
nv16
Blocking
>1
>1
Open
enable
Inter-
locking
Close
enable
Open
I/O
I/O
Close
REF 54_
RE_ 54_
1
on
active
enabled
high
true
alarm
Part 1, General
LON
nv16 nv16 nv16
nv16 nv16
nv16
>1 >1
Inter-
locking
Reserve
I/O
I/O
REF 54_ RE_ 54_
nv16
nv16
Blocking
Open
enable
Close
enable
Open
Reserve
Close
lonlog
Page 43