AH500 Programming Manual 2-44 Limited Special auxiliary Refresh time to relay ON: The PLC runs. SM220 Users set SM220 to ON and reset it to OFF. ON: Calibrating the real-time clock within ±30 seconds SM400~SM401 The system automatically sets the flag to ON and resets it to OFF. The flag is refreshed every scan cycle. SM402~SM403 The system automatically sets the flag to ON and resets it to OFF. The flag is refreshed whenever the instruction END is executed. SM404 The system automatically sets the flag to ON and resets it to OFF. SM404 is refreshed every 5 milliseconds. SM405 The system automatically sets SM405 to ON and resets it to OFF. SM405 is refreshed every 50 milliseconds.
SM406 The system automatically sets SM406 to ON and resets it to OFF. SM406 is refreshed every 100 milliseconds. SM407 The system automatically sets SM407 to ON and resets it to OFF. SM407 is refreshed every 500 seconds. SM408 The system automatically sets SM408 to ON and resets it to OFF. SM408 is refreshed every second. SM409 The system automatically sets SM409 to ON and resets it to OFF. SM409 is refreshed every n seconds, n is specified by SR409. SM410 The system automatically sets SM410 to ON and resets it to OFF. SM410 is refreshed every n seconds, and n is specified by SR410. SM450 The system automatically sets SM450 to ON and resets it to OFF. ON:
The memory card is inserted into the PLC. SM451 Users set SM451 to ON and reset it to OFF. ON: The memory card is write protected. SM452 The system automatically sets SM452 to ON and resets it to OFF. ON: The data in the memory card is being accessed. SM453 The system automatically sets SM453 to ON and resets it to OFF. ON: An error occurs during the operation of the memory card. SM600~SM602 The system automatically sets the flag to ON and resets it to OFF. The flag is refreshed when the instruction is executed. SM604 Users set SM604 to ON and reset it to OFF. SM604 is refreshed when the instruction SORT whose mode is the descending order is executed.
SM605 Users set SM605 to ON and reset it to OFF. SM606 Users set SM606 to ON and reset it to OFF. ON: The 8-bit mode SM607 Users set SM607 to ON or OFF. SM608 SM608 is refreshed when the instruction is executed. SM609 Users set the flag to ON or OFF. SM610~SM611 The flag is refreshed when the instruction is executed. SM612~SM613 Users set the flag to ON or OFF. SM614 SM614 is refreshed when the instruction is executed. SM615~SM617 Users set the flag to ON or OFF. SM618 SM618 is refreshed when the instruction is executed. SM619 SM619 is refreshed when EI or DI is executed. SM620 SM620 is refreshed when the instruction CMPT is executed. SM621~SM686 Users set the flag to ON or OFF.
SM687 SM687 is refreshed when the instruction RAMP is executed. SM688 SM688 is refreshed when the instruction INCD is executed.