Motorola 68P02958C00-B - Manual (Page 33)

System Overview
2-13
• Testing all hardware modules, including software calibration of analog inputs and
outputs
• Retrieving time-tagged events (of down to 1mSec resolution) logged in the RTUs
• Synchronizing the RTU real-time clock
• Retrieving errors logged in the RTUs (hardware or software malfunctions)
• Capturing the data packets on the communication links and analyzing the protocol
seven layer
• System software diagnostics by object entity names
The definition of the RTU application program allows the system engineer to build the RTU’s
database in a tabular form as a set of tables. The same tables used for the RTU database
definition are the basis for process programming, I/O link definition, automatic central
database definition, real-time monitoring of RTU operation, etc.
Once the database is built, the RTU programming process is carried out by using the symbolic
Motorola Advanced Ladder Diagram Language.
IP Gateway for TCP/IP
The IP Gateway hardware is based on the 68360 Motorola microprocessor, which is a smart
CPU with Ethernet and an I/O controller. It includes support for TCP/IP over an Ethernet port
(10Base-T and AUI connectors) for communication with the SCADA, and three serial ports
for communication with the Toolbox and with the MOSCAD RTUs.
The IP Gateway includes 22 LEDs, located on its front panel which indicate hardware status
and communication port activity. In case of a malfunction, see the Indication LEDs section in
the Hardware Installation section of this manual.
Two Ethernet connectors give support for connection to either a Twisted-Pair Ethernet cable
(via 8-pin RJ45 connector) or a Thick-Wire Ethernet cable (via 15-pin AUI connector). To
connect a Thin-Wire coaxial cable to the IP Gateway, a Thin-Wire to AUI connector unit
which allows connecting the coaxial cable to the AUI port, should be used (not supplied).
The IP Gateway software provides MDLC services to the SCADA control center applications.
The MDLC application layer is used for receiving events, status and telemetry calculated data
from the MOSCAD RTUs to the SCADA
central applications. It is also used to send controls
and process parameters from the SCADA central to the MOSCAD RTUs. The IP Gateway
software includes the TCP/IP driver for communicating with the SCADA computers and the
MDLC driver for communicating with the MOSCAD RTUs as well as with the MOSCAD
Programming Toolbox.