Chapter 2 Devices 2_ 2-41 Special auxiliary Refresh time relay ON: counting down OFF: counting up SM349 You set the flag to ON and reset it to OFF. ON: counting down OFF: counting up SM350 You set the flag to ON and reset it to OFF. ON: counting down OFF: counting up SM351 You set the flag to ON and reset it to OFF. ON: counting down OFF: counting up SM352–SM353 You set the flag to ON and reset it to OFF. ON: counting down OFF: counting up SM400–SM403 The system automatically sets the flag to ON and resets it to OFF. The flag is refreshed every scan cycle. 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 0.5 seconds. SM450 The system automatically sets SM450 to ON and resets it to OFF. ON: memory card is inserted into the PLC. OFF: memory card is removed out of the PLC. SM452–SM453 The system sets the flag to ON or OFF. SM454 You set the flag to ON or OFF. SM455 The system sets the flag to ON or OFF. SM456 You set the flag to ON to save.
After the saving is complete, the system resets it to OFF. SM457 The system sets the flag to ON or OFF. SM460 The system sets the flag to ON or OFF. SM461 The system sets the flag to ON and you reset it to OFF. SM462–SM464 You set the flag to ON or OFF. SM465 The system sets the flag to ON and you reset it to OFF. SM466 You set the flag to ON or OFF. SM467 The system sets the flag to ON and you reset it to OFF. SM468–SM471 You set the flag to ON or OFF. SM472 The system sets the flag to ON or OFF. SM473 The system sets the flag to ON and you reset it to OFF. SM474–SM477 You set the flag to ON or OFF. SM478–SM479 You set the flag to ON or OFF and the system sets the flag to OFF.
SM480 The system sets the flag to ON or OFF. SM481 The system sets the flag to ON and you reset it to OFF. SM482–SM484 You set the flag to ON or OFF. SM485 The system sets the flag to ON and you reset it to OFF.