Adjusting Frequency References; Adjusting Analog Frequency References - YASKAWA Varispeed E7 Instruction Manual And Parameter Description

Adjusting Frequency References

This section explains methods of adjusting frequency references.

Adjusting Analog Frequency References

Gain and bias are among the constants used to adjust analog inputs.
Related Constants
Con-
stant
Number
Frequency reference terminal A1
H3-02
input gain
Frequency reference terminal A1
H3-03
input bias
Multi-function analog A2 signal
H3-08
level selection
Multi-function analog A2 func-
H3-09
tion selection
Multi-function analog A2 input
H3-10
gain
Multi-function analog A2 input
H3-11
bias
Analog input filter time constant
H3-12
H3-13 Terminal A1/A2 switching
Adjusting Analog Frequency Reference Using Constants
The frequency reference can be input from the control circuit terminals using analog voltage and current sig-
nals.
If using terminal A1 as an input terminal for the frequency reference value, perform adjustments using con-
stants H3-01 to H3-03. If using multi-function analog input terminal A2 as a frequency reference terminal,
perform adjustments using H3-08 to H3-11. Set the analog input signal level using the constants H3-01 or
H3-08. Refer the following figures for setting the input gain and bias.
Frequency reference
-22
6
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Name
Sets the frequency as a percentage of the maximum output
frequency, when 10V is input.
Sets the frequency as a percentage of the maximum output
frequency, when 0V is input.
0: 0 to +10V (11 bit)
2: 4 to 20 mA (9-bit input)
3: 0 to 20 mA (9-bit input)
Switch current and voltage input using the switch S1 on
the control terminal board.
Selects the multi-function analog input function for termi-
nal A2.
Sets the input levelwhen terminal A2 input is 10V (20mA)
according to the 100% value of the function set in constant
H3-09.
Sets the input level when terminal A2 input is 0V (4mA)
according to the 100% value of the function set in constant
H3-09.
Sets primary delay filter time constant for the two analog
input terminals (A1 and A2). Effective for noise control
etc.
0: Use terminal A1 analog input as main frequency refer-
ence.
1: Use terminal A2 analog input as main frequency refer-
ence.
Effective when H3-09 is set to 2.
Terminal
input voltage
Terminal A1 input
Fig 6.21 Terminals A1 and A2 Inputs
Description
Frequency reference
A1
0V (4 mA/0 mA)
Terminal A2 input
Change
Setting Factory during Access
Range Setting Opera- Level
tion
0.0 to
100.0% Yes A
1000.0
-100.0
to 0.0% Yes A
+100.0
0, 2, 3 2 No A
0 to 16 0 No A
0.0 to
100.0% Yes A
1000.0
-100.0
to 0.0% Yes A
+100.0
0.00 to
0.00 s No A
2.00
0 or 1 0 No A
Terminal A2 input
voltage (current)