Communication Overview; Lon Communication - ABB REC 523 Technical Reference Manual

REC 523
6.3.
6.4.
52
Remote Monitoring and Control Unit
Technical Reference Manual

Communication overview

COMM_OUT
COMM_IN
Event
buffer
Changed
process
data
Application
IEC 61131
Commands or
parameterization
Command
Fig. 6.3.-1 REC52_ Communication overview

LON communication

LON communication to/from REC 523 units falls into two categories:
• Communication based on network variables
• Communication based on explicit messages
Network variables are used when communication need to be interoperable with
other commercially available LON devices. This is referred to as LonMark slave
communication. For more information about interoperable communication, refer to
the Echelon documents listed in Section 1.8. Related documents.
Explicit message communication falls into two main categories:
1) Standard LON messages (containing network management messages, router
configuration messages, and so on)
2) Foreign messages
Neuron
communication
LONMark
slave
communication
L
O
N
line
Session
handling
1
2
3
4
SPA
Async. communication
slave
communication
SPA
line
Remote
Link
communication
handler
protocol
1MRS750881-MUM
SNVT_state
SNVT_lev_disc
NV indexes
0...63, 100...163
Network Variables
(horizontal communication,
e.g. between two REC 523
SNVT types
units)
Lon Mark connector X5.3
comm. profile
NV indexes
64...97
Sliding
Explicit Messages
window
(vertical communication,
e.g. MicroSCADA)
connector X5.3
Commands or
parameterization
connector X5.3
(connector X5.2
for parameterization)
Async. communication
Remote
comm.
connector X5.1
line