4-2 Function Mode •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 AT terminal selection is set to the FV/volume selection (A005 = 02) or FI/volume selection (A005 = 03) since the frequency reference is set on the Digital Operator (volume) with the AT terminal turned on. 4 External analog input frequency reference (FV, FI) Starting frequency Functions 0Hz External analog input disconnection detection (DC) OFF ON 500 ms 500 ms PID FB Status Output When the PID function is used, this function outputs a signal according to the FB value, as illustrated below. This is effective as a RUN command in operating multiple pumps.
PID FB upper limit (C052) PID FB value PID FB lower limit (C053) FW FBV OFF at output frequency = 0 4-67 Data Symbol Function name Status Description 07 FBV PID FB status output ON See the figure below. Shifts output when exceeding the upper limit or falling below the lower limit. OFF Available input terminals P1-PC, MA-MC (or MB-MC) Required settings C021, C026, C052, C053 ON OFF ON ON