64
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When the analog output (1) characteristics selection is 6F speed (b-21 = -2) or 6F calibration (b-21 =
-3)
In addition to the parameter change, you need to change the setting of the switch (SW2) on VFC66-Z. Set the
switch (SW2) to 1 (toward the console panel) using a tip of tweezers or a jig with a very thin tip (about
0.8 mm).
TB1
CN-SO
CN-SI
RY1
CN3
SW2
SW1
CN4
LED1
52MA
86Aa
86Ab
P
COM
GND
+10
PS
PS
MI3
GND
GND
52MA
86A
MO1
MO2
AOT1
AIN1
ST-F
MI1
MI2
MI4
MI5
CN5
3
1
ON
RY2
CN6
SET66-Z
CN7
CN4
VFC66-Z
1.
When the analog output (1) characteristics selection is 6F speed
(b-21 = -2)
The [VFC66-Z TB1] (AOT1) - (GND) terminal outputs a signal with a frequency of six times of the value
converted into frequency F (6F signal).
The value converted into frequency F is calculated by the following expression:
F = Motor speed / 60 (Hz)
2.
When the analog output (1) characteristics selection is 6F calibration
(b-21 = -3)
Outputs a signal with a frequency that is six times of a value equivalent to the maximum speed (A-00).
When using a digital counter type frequency/revolution-counter, divide the frequency of the pulse count by
six. When using a DC voltmeter, the characteristics are similar to ones shown in "Frequency - voltage
characteristics" in the right part of the following figure as an average of the 6F signal output. Therefore,
adjust in accordance with these characteristics.
Note that when the maximum speed (A-00) converted into frequency F exceeds 120 Hz, apply the half of
these characteristics, and when it exceeds 240 Hz, apply the quarter of these characteristics.
6F signal output waveform
(The output current is 5 mA at most)
Frequency - voltage characteristics
(When the maximum speed converted into frequency
F is 120 Hz or less)
T1 and T2 in the figure are
T1 = 1 msec (When the maximum speed converted into frequency F is 120 Hz or less)
= 0.5 msec (When the maximum speed converted into frequency F is 240 Hz or less)
= 0.25 msec (When the maximum speed converted into frequency F exceeds 240 Hz)
T2 = 1 / (6 x Fout)
T2
T1
About
10 V
3.6 V
60 Hz
Frequency (converted value)
Voltage
SW2
3
1
