| Product
Details :
The MOSCAD-L CPU module is the brain of the MOSCAD-L
product line. It has a Motorola 68LC302 16/32-bit
CMOS processor, RAM and Flash memory, plus the interfaces
to the I/O and communication aspects of the RTU; time
functions are supported by a software clock in the
operating system.
The CPU module plugs into the module rack immediately
adjacent to the power supply module. The CPU module
may be programmed by ladder-logic, using the MOSCAD-L
Programming ToolBox, to provide it with the capabilities
expected of a PLC. Compiled functions written in “C”
may be downloaded into the CPU module.
The CPU module includes 20 LEDs that provide information
regarding the operation of the CPU and I/O modules.
The LEDs indicate the availability of a configuration
and application in Flash memory, communication status
via the ports, state of I/O module connections, etc.
The CPU module contains three data ports with different
capabilities :
- Port 1 provides either RS-485 (2-wire multidrop)
or async RS-232 (data but no RTS, CTS, DTR, etc.)
communications to the Programming ToolBox or sync
RS-232 communications to CPU modules in other MOSCAD
or MOSCAD-L RTUs.
- Port 2 provides async RS-232 communications and
may be configured as either DTE or DCE for data
connectivity under the control of the loaded application
or configured as a system port for local ToolBox
use.
- Port 3 is normally the communication port and
contains a plug-in communication interface appropriate
to the medium used. The port may also be provided
with a full RS-232 plug-in when required.
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