Mitsubishi Electric FR-A700 Series, Technical Manual

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229
2
P
ARAM
ETE
R
PARAMETER
(2) Adjustment of pulse train input and
frequency [ Pr. 385, 386 ]
Frequency for zero input pulse can be set using [ Pr.
385 Frequency for zero input pulse ] and frequency at
maximum input pulse can be set using [ Pr. 386
Frequency for maximum input pulse ].
(3) Calculation method of scaling factor of
input pulse [ Pr. 384 ]
Maximum input pulse can be calculated from the
following formula using [
Pr. 384 Input pulse division
scaling factor ].
For example, when you want to operate at 0Hz when
pulse train input is zero and operate at 30Hz when
pulse train is 4000 pulse/s, set parameters as below.
2.4.8 Frequency setting by 16 bit digital input (FR-A7AX) [Pr. 300 to 305, 329]
(A700)(F700)(E700)
16bit (12bit) digital input is available for the inverter with a plug-in option FR-A7AX installed and [ Pr. 304 9999 ] is set.
For , using digital input as a torque command is also available. (Refer to page 301)
*
Limit value can be calculated from the following formula.
([
Pr. 386 ] - [ Pr. 385 ]) 1.1 + [ Pr. 385 ]
60Hz
[ Pr.386 ]
0Hz
Limit value*
input pulse
(pulse/s)
0
=
Pr.385 ]
= Pr.384 ? 400(maximum 100k pulse/s)
Output
frequency
(Hz)
Maximum input pulse
Maximum input pulse (pulse/s) = [ Pr. 384 ] 400
[ Pr. 384 ] = 10
(maximum input pulse 4000 pulse/s)
[
Pr. 385 ] = 0Hz
[
Pr. 386
] = 30Hz
(pulse train limit value is 33Hz)
maximum of 100k pulse/s
detectable pulse = 11.45 pulse/s ( )
A700
F700 E700
A700
[ Pr. ] Name
Initial
Value Setting
Range
Description
Available
Inverters
300
BCD input bias
0Hz 0 to 400Hz Set bias frequency for BCD code input
301
BCD input gain
60Hz
0 to 400Hz Set gain frequency for BCD code input
9999 Digital input value is the output frequency
302
BIN input bias
0Hz 0 to 400Hz Set bias frequency for binary input
303
BIN input gain
60Hz
0 to 400Hz Set gain frequency for binary input
9999 Digital input value is the output frequency
304
Digital input and analog
input compensation
enable/disable
selection
9999
Input selection
Availability of Analog
Input Compensation *
1
0 3 digits BCD code input
*2
1 12bit binary input
*2
2 3 digits BCD code input
*2
—
3
12bit binary input *2
4
12bit binary Torque
command value input
*2
— —
10 4 digits BCD code input
11 16bit binary input
12 4 digits BCD code input
—
13 16bit binary input
14
16bit binary Torque
command value input
— —
9999 No function
305
Read timing operation
selection
0
0 Data is always read regardless of DY signal.
1 Data is read only when DY signal is ON.
10
Data is always read regardless of DY signal.
With filter at reading.
329
*3
Digital input increments
selection
1
0 Input value increments 10
1 Input value increments 1
2 Input value increments 0.1
3 Input value increments 0.01
*1 Use terminal 1 for analog input compensation.
*2 X12 to X15 signal of plug-in option FR-A7AX is invalid.
*3 Writing during running is unavailable even when [ Pr. 77 = 2 ]. When changing the parameter setting, stop the operation.
Also parameter clear is invalid.
A700 F700 E700