5.1 Startup Sequence and Basic Operation
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 9.2 LED Indicator Meanings .
( 2 ) Self-configuration
Self-configuration automatically recognizes the connected Optional Modules, and automatically creates a definitions
file. For details, refer to 5.4 Self-configuration .
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. For DWG.A (startup processing drawing), refer to 5.2.4 Ladder
Drawings (DWG).
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
MP2300S 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 9.2 LED Indicator Meanings .
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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