Dancer feedback speed control details
66
Line speed command input signal (X125 signal)
• During speed control, turning ON the Line speed / tension command input (X125) signal enables write and read of the line
speed command value through communication regardless of whether the dancer feedback speed control is valid or invalid.
• The signal is useful for inputting the line speed command value while dancer feedback speed control is invalid, or switching
validity of the dancer feedback speed control without accidentally changing the frequency command value.
• The following table shows the ON/OFF status of the X125 signal and the validity of the available commands.
(
: Valid through communication,
×
: Invalid through communication)
• The X125 signal affects the input methods as follows.
• To input the X125 signal, set "125" in any of
Pr.178 to Pr.189 (input terminal function selection)
to assign the function.
NOTE
• If the X125 or X114 signal is used to switch the command from frequency to line speed while the Frequency setting screen is
displayed on the FR-LU08/FR-PU07, the setting screen remains the same. However, when a frequency value is written, the
value is set as a line speed value.
For example, if 60.00 Hz is entered in the Frequency setting screen of the FR-LU08 while the X125 signal is OFF and then
the X125 signal is turned ON before pressing the WRITE key, the Frequency setting screen is still displayed. When the
WRITE key is pressed under this condition, "600.0" is written as a line speed command value.
Line speed command for starting (Pr.622)
• Use
Pr.622 Line speed command for starting
to set the line speed command for starting operation.
• The line speed command is regarded as zero while the line speed command input value is less than the
Pr.622
setting.
• When the line speed command input value reaches or exceeds the
Pr.622
setting, the commanded line speed is applied for
operation.
3.5.4
Compensation for line speed command input
Set the following parameters for setting added compensation or override compensation for the line speed command.
Dancer feedback
speed control
X125 signal
status
Validity of setting through communication
Line speed command
Frequency command
Valid
ON
×
OFF
×
Not assigned to
a terminal
×
Invalid
ON
×
OFF
×
Not assigned to
a terminal
×
Input method affected by the X125 signal
Input method not affected by the X125 signal
Operation panel
RS-485 communication (Mitsubishi inverter protocol, MODBUS RTU)
Communication option (FR-A8NC, FR-A8ND, FR-A8NCE, FR-A8NP)
PLC function
Pulse train input
Analog input
Multi-speed input
FR-A8AX
Parameter
Pr.
Name
Initial value
Setting range
Description
252
T050
Override bias
50%
0 to 1000%
Set the bias compensation value for the override
function.
253
T051
Override gain
150%
0 to 1000%
Set the gain compensation value for the override
function.
635
R214
Line speed command added
compensation value voltage/
current bias
9999
0 to 100%, 9999
Set the converted % of the bias voltage (current) for
analog input.
636
R215
Line speed command added
compensation value bias
9999
0 to 6553.4 m/min
9999
Set the bias line speed compensation value for
analog input.
637
R216
Line speed command added
compensation value voltage/
current gain
9999
0 to 100%, 9999
Set the converted % of the gain voltage (current) for
analog input.
Содержание A800 Plus Series
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