4-2 Function Mode External Analog Input Disconnection Detection 4 •Outputs a signal if an error is detected in the external analog inputs (FV, FI). Functions •The disconnection detection signal is output if the frequency reference of the external analog input remains below the starting frequency for 500 ms. •The signal stops 500 ms after the frequency reference has exceeded the starting frequency. •Helps detect disconnection when a frequency reference is issued from the external analog inputs (FV, FI) with the frequency reference selection set to the terminal (A001 = 01). •Enabled only when the external analog inputs (FV, FI) are selected. Example 1:
Disabled in multi-step speed operation even when the frequency reference is set to the external analog input (A001 = 01). Example 2: Disabled even when the FV/FI selection is set to the FV/VR selection (A005 = 02) or FI/VR selection (A005 = 03) since the frequency reference is set on the Digital Op- erator (volume) with the AT terminal turned on. Starting frequency External analog input frequency reference (FV, FI) 0Hz OFF ON External analog input disconnection detection (DC) 500 ms 500 ms 4-57 Data Symbol Function name Status Description 05 AL Alarm output ON The Inverter is in trip status. OFF The Inverter is normal.
Available input terminals P1-PC, P2-PC, MA-MC (or MB-MC) Required settings C021, C026 Data Symbol Function name Status Description 06 Dc Disconnection detection ON The Inverter is in trip status. OFF The Inverter is normal. Available input terminals P1-PC, P2-PC, MA-MC (or MB-MC) Required settings C021, C022, C026, A001, A005