AH500 Programming Manual 2-40 Special auxiliary relay Refresh time SM1520 ↓ SM1551 SM1520 is ON when the PLC Link is enabled and the master finishes reading the data from slave 1. ↓ SM1551 is ON when the PLC Link is enabled and the master finishes reading the data from slave 32. SM1552 ↓ SM1583 SM1552 is ON when the PLC Link is enabled and the master finishes writing the data into slave 1. ↓ SM1583 is ON when the PLC Link is enabled and the master finishes writing the data into slave 32. SM1584~SM1587 Users set the flag ON and reset it OFF. SM1588 SM1588 is ON when the master detects the slaves. SM1589 SM1589 is ON when an error occurs.
SM1590 SM1590 is ON when there is a device address error. SM1591 SM1591 is ON when there is a timeout. SM1592 SM1592 is ON when the number of polling cycles is incorrect. SM1593~SM1595 Users set the flag to ON and reset it to OFF. SM1596 SM1596 is ON when there is an operation error in the PLC Link SM1597~SM1598 Users set the flag to ON and reset it to OFF. SM1600 Users set SM1600 to ON and reset it to OFF. SM1601~SM1602 The flag is refreshed when the instruction READ is executed. SM1603 SM1603 is refreshed when the instruction READ is executed and an error occurs. SM1604 SM1604 is refreshed when the instruction READ is executed and there is a response timeout.
SM1605 Users set SM1605 to ON and reset it to OFF. SM1606~SM1607 The flag is refreshed when the instruction READ is executed. SM1608 SM1608 is refreshed when the instruction READ is executed and an error occurs. SM1609 SM1609 is refreshed when the instruction READ is executed and there is a response timeout. SM1610 Users set SM1610 to ON and reset it to OFF. SM1611~SM1612 The flag is refreshed when the instruction READ is executed. SM1613 SM1613 is refreshed when the instruction READ is executed and an error occurs. SM1614 SM1614 is refreshed when the instruction READ is executed and there is a response timeout. SM1615 Users set SM1615 to ON and reset it to OFF.
SM1616~SM1617 The flag is refreshed when the instruction READ is executed. SM1618 SM1618 is refreshed when the instruction READ is executed and an error occurs. SM1619 SM1619 is refreshed when the instruction READ is executed and there is a response timeout. SM1620 Users set SM1620 to ON and reset it to OFF. SM1621~SM1622 The flag is refreshed when the instruction READ is executed. SM1623 SM1623 is refreshed when the instruction READ is executed and an error occurs. SM1624 SM1624 is refreshed when the instruction READ is executed and there is a response timeout. SM1625 Users set SM1625 to ON and reset it to OFF. SM1626 and SM1627 The flag is refreshed when the instruction READ is executed.