5.4 Details of Function Codes
5-163
Details of
Function Codes
F codes
E61 to E65
C codes
P codes
H codes
A codes
b codes
r codes
J codes
d codes
U codes
y codes
Chapter 5 Function Code
E64
Saving of Digital Reference Frequency
With this function, the saving method of frequency set by the
/ keys on the keypad can be selected.
Table 5.4-89
E64 Data Saving Method
0
Auto saving when the main power is turned off. When the power is turned on, the
frequency setting, which was obtained at when the main power was shut down in the
last time, can be applied for restarting.
1
Saving is possible by pressing the
key. If the key is left un-pressed, if the control
power is turned off, the data get lost. When the power is turned on, the frequency
setting, which was obtained at when the
key was pressed the last time, can be
applied for restarting.
E65
Command Loss Detection (Continuous Running Frequency)
When the analog frequency setting (frequency setting through terminals [12], [C1], [V2]) drops to 10% or
lower of the frequency setting within 400 ms, the inverter presumes that the analog frequency command wire
has been broken and continues its operation at the frequency determined by the ratio set by E65 to the
frequency setting. Then, the inverter outputs the command loss detect REF OFF signal.
(
Function code E20 to E24, E27 data = 33)
When the frequency setting returns to a level equal to or higher than the one specified by E65, the inverter
presumes that the broken wire has been fixed and continues to run with the regular frequency setting.
Fig. 5.4-73
f1 is an analog frequency setting sampled at any given time. The sampling is updated repeatedly to judge
the wore breakage.
- Data setting range: 0 (decelerate and stop), 20 to 120 (%), 999 (cancel)
Avoid an abrupt voltage or current change for the analog frequency command. An abrupt change
may be interpreted as a wire breakage.
When E65 = 999 (cancel) is set, the setting frequency does not switch even when the command
loss detection REF OFF signal is output. (The operation proceeds as the input frequency setting.)
When E65 = 0 or 999, the recovery level from the wire breakage is "f1 x 0.2."
When E65 = "100"% or higher, the recovery level from the wire breakage is "f1 x 1."
The command loss detection is not affected by the analog input adjustment (filter: C33, C38, and
C43).
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