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1MRS750881-MUM
Remote Monitoring and Control Unit
Technical Reference Manual
REC 523
6.5.
Virtual IEC 61131 inputs and outputs
The REC 523 unit offers up to 64 programmable LON inputs and 64 outputs on the
LON bus, 128 in total. The inputs and outputs use the LonMark Standard Network
Variables (NV type 83 = SNVT_state and NV type 22 = SNVT_lev_disc) for
sending and receiving process data.
The LON inputs and outputs are accessible in the relay configuration and can be
freely used for different types of data transfer between the REC units and other
devices that are able to communicate using the network variable of type SNVT_state
or SNVT_lev_disc.
Fig. 6.5.-1 Principle of connecting LON inputs and outputs to logic functions of
the device
132...
147
IN
SNVT_lev_disc
22
8 bit INT
Virtual IEC 61131 inputs (Relay
Configuration Tool def.
COMM_IN_49...64)
148...
163
OUT SNVT_lev_disc
22
8 bit INT
Virtual IEC 61131 outputs
(Relay Configuration Tool def.
COMM_OUT_49...64)
Table 6.4.1-1
Network variable indexes (Continued)
NV
index
Dir. SNVT_Type
SNVT
number
Object
Type
Comments
>1
nv16
nv16
nv16
I/O
REF 54_
>1
nv16
nv16
nv16
I/O
REF 54_
>1
nv16
REC 523
SYS
LON
LON
REC 523
>1
nv16
nv16
nv16
REC 523
nv16
nv16
nv16
>1
nv16
nv16
Rec_Llog
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