3 Nomenclature and Functions
3-4
CJ2 CPU Unit Hardware User’s Manual
The status of a Memory Card mounted in the CJ2 CPU Unit can be checked with the indicators in the
middle of the front panel of the Unit. The following table describes these indicators.
Memory Card Indicators
Indicator Color Status Meaning
MCPWR Green Lit Power is being supplied to the Memory Card.
Flashing Flashes once: Simple backup read, write, or verify normal
Flashes five times: Simple backup read malfunction
Flashes continuously: Simple backup write or verify malfunction
Not lit Power is not being supplied to the Memory Card.
BUSY Yellow Flashing Memory Card is being accessed.
Not lit Memory Card is not being accessed.
DIP Switch
Pin no. Usage Setting Function Default
SW1 Used to prevent programs from being
accidently overwritten from Program-
ming Devices (including the CX-Pro-
grammer).
ON Writing disabled for user pro-
gram memory.
*1
OFF
OFF Writing enabled for user pro-
gram memory.
SW2 Set to ON to read the program
(AUTOEXEC.OBJ file) and parameter
area (AUTOEXEC.STD file) from the
Memory Card to the CPU Unit when
power is turned ON.
*2
Used to store the programs in the
Memory Card to switch operations, or
to automatically transfer programs at
startup (Memory Card ROM opera-
tion).
*3
ON The user program is automati-
cally transferred from the Mem-
ory Card when power is turned
ON.
OFF
OFF The user program is not auto-
matically transferred from the
Memory Card when power is
turned ON.
SW3 Not used. --- --- OFF
SW4 Not used. --- --- OFF
OPEN
PERIPHERAL
BUSY
MCPWR
1
2
345
6
78
ON
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