n046 : Frequency Reference Loss Detection
(Ref Loss Detect)
n047 : Frequency Reference Level at Loss Factory setting: 80%
of Frequency Detection
Range: 0 - 100%
(Fref Lvl@FLoss)
The reference loss detection function is either enabled or disabled, based on the setting of
n046 . When enabled (n046= "RUN @ n047 Freq" (" 1 ")), the reference loss detection
compares the change in reference with respect to time. If the reference decreases by 90%
in more than 0.4 seconds, the drive will decelerate to the set reference; if the reference
decreases by 90% in less than 0.4 seconds, the drive will continue to operate at a
percentage of the output frequency. This percentage can be set in parameter n047. To
regain control of output frequency, either exceed the set reference (n047 * original
frequency reference) or initiate a STOP command. If Auto Reference is less than Fmax
(n011 ) x .05, this function is not performed.
FWD RUN
COMMAND
AUTO
REFERENCE
GPD DRIVE
OUTPUT
FREQUENCY
80%
REF
10%
80%
FREQ.
0.4 SEC 0.4 SEC
Time Chart
5-18
5.13 FREQUENCY REFERENCE - LOSS DETECTION
LED LDC Terminal FI Signal Level
Setting Setting
0 * 0-10 VDC* 0 to 10 V input
1 4-20mA 4 to 20 mA input
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