4-67
4-2 Function Mode
4
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 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.
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.
Starting
frequency
0Hz
External analog
input disconnection
detection (DC)
OFF
ON
500 ms
500 ms
External analog input
frequency reference (FV, FI)
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
PID FB
upper limit
(C052)
PID FB
lower limit
(C053)
PID FB value
FW
FBV
ON
ON
OFF
ON
OFF at output frequency = 0
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