5
Outline of Motion Control Systems
5.1.3
Startup Sequence Operation Details
5-4
5.1.3 Startup Sequence Operation Details
( 1 ) Self-diagnosis at Startup
Self-diagnosis is performed on the following items after the power is turned ON.
• Read/write diagnosis of memory (RAM)
• System program (ROM) diagnosis
• Main processor (CPU) function diagnosis
• Floating Point Unit (FPU) function diagnosis
If diagnosis results in an error, the ALM and ERR LED indicators will blink red for the specified
number of times. Refer to 5.1.4 LED Indicator Details on page 5-5.
( 2 ) Self-configuration
Self-configuration automatically recognizes the connected Optional Modules, and automatically cre-
ates a definitions file. For details, refer to 5.4 Self-configuration on page 5-28.
The RUN LED indicator will blink green during execution of self-configuration.
( 3 ) Operation Start
When the STOP switch is set to OFF (RUN) or changes from ON (STOP) to OFF (RUN), the CPU
starts the watchdog timer and then executes DWG.A in the ladder program. Refer to the startup pro-
cessing drawing and 5.2.2 Execution Control of Drawings on page 5-7.
First scan processing is executed once DWG.A has been completed and the high-speed or low-speed
scan time has elapsed. System I/O are executed from the first scan.
( 4 ) Operation Stop
MP2300 stops motion control operation when the STOP switch is ON (STOP) and in the following
circumstances.
( 5 ) Online Self-diagnosis
Self-diagnosis is performed on the following items when the user logs on online.
• System program (ROM) diagnosis
• Main processor (CPU) function diagnosis
• Floating Point Unit (FPU) function diagnosis
If diagnosis results in an error, the ALM and ERR LED indicators will blink red for the specified
number of times. Refer to 5.1.4 LED Indicator Details on page 5-5.
Cause Restart method
Power supply turned OFF
Turn ON the power again.
Power interruption
Fatal error
Check the LED indicator for the cause of the error and
then turn the power OFF then ON.
STOP executed from MPE720
Execute RUN from MPE720 .
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