Rockwell Automation 1772-LV,D17726.6.1 A and I MNL MINI-PLC-2/15 PROCESSO - Manual (Page 13)

Controller Components
Chapter 2
2Ć8
The Mini-PLC-2/15 Processor Module (Cat. No. 1772-LV) is the central
processing unit and memory of the programmable controller. It has 2K words of
memory for the Data Table, User Program and messages. it can monitor and
control up to 128 I/O devices that are wired to I/O Modules in the I/O Chassis.
The Processor examines data from input devices, processes this data according
to the User Program, and transmits data to control the output devices. In
addition, the Processor monitors the status of its own operation, of data in
memory, and of power from the System Power Supply. Orderly shutdown is
provided if a malfunction from any of these points is detected.
The Mini-PLC-2/15 Processor (Figure 2.5) has three diagnostic indicators, a
Mode Select Switch, an INTERFACE port and an EPROM access door. In
addition,the Processor has a memory write protect feature that is active when a
programmed EPROM is in place in the Processor.
Figure 2.4
I/O Chassis Sizes
10106-I
32 I/O 64 I/O 128 I/O
Switch Group
Assembly
Backplane Sockets
Power Supply Socket
Diagnostic I ndicators
There are three diagnostic indicators on the front of the Processor to show the
status of its operation (Figure 2.5). They are:
PROCESSOR - When the Mode Select Switch is in the TEST, RUN or
RUN/PROG position, this red indicator illuminates if a hardware fault in the
Processor occurs or the Processor cannot scan the memory.
MEMORY - In the TEST, RUN or RUN/PROGRAM mode, this red
indicator illuminates if the Mini-PLC-2/15 Processor detects no user
MiniĆPLCĆ2/15 Processor