Mdlc Over Private Datatac - Motorola MOSCAD 68P02958C00-B User Manual

IP Gateway
ToolBox
(over IP)
MOSCAD
Programming
ToolBox
(over IP)
Figure 2-4: Typical Configuration, MDLC via Astro IP

MDLC Over Private DataTac

MOSCAD RTUs can communicate over Private DataTac systems (RDLAP) with SCADA
centrals and with other RTUs. All MDLC features are preserved except for clock
synchronization.
RTUs are connected to RDLAP (DataTac) radios (e.g. VRM 500, 600, 650, 660, and TRM
660) via RS232. An RTU sends a message (MDLC), through the radio to the Radio Network
Controller (RNC). The RNC encapsulates the MDLC message and send it over IP to the IP
Gateway. The IP Gateway then extracts the MDLC message from the IP envelope and
transmits it to the appropriate destination. If the destination is another RTU over Private
DataTac, the IP Gateway must support the reflector feature, which enables it to "reflect" the
message back over RDLAP (DataTac).
SCADA Central
LINE 1
RS232
IP Gateway
ASTRO Spectra Radio
LINE 1
SLIP
Connection
RS232
MOSCAD
RTU
2-6
Ethernet
IP Cloud
RNC
ASTRO RF
System
MOSCAD-L
System Overview
IP Network
ASTRO Spectra Radio
LINE 1
SLIP
Connection
RTU