Yaskawa Matrix Converter - Manual (Page 235)

6
-70
„ Application Precautions
• When d4-01 is set to 1, the output frequency on hold is stored even after the power supply is turned off. If
performing operations using this frequency after the MxC has also been turned off, input the Run Com-
mand with the Accel/Decel Ramp Hold turned on.
• When d4-01 is set to 0 and a Run Command is input while the Accel/Decel Ramp Hold is turned on, the
output frequency will be set to zero.
• If an Accel/Decel Ramp Hold Command is entered by mistake when decelerating during positioning,
deceleration may be canceled.
‹ Raising and Lowering Frequency References Using Contact Signals (UP/
DOWN)
The UP and DOWN Commands raise and lower MxC frequency references by turning on and off multi-func-
tion digital input terminal S3 to S7.
To use this function, set one of the parameters H1-01 to H1-10 (Terminal S3 to S12 Function Selection) to 10
(UP Command) and 11 (DOWN Command). Be sure to allocate two terminals so that the UP and DOWN
Commands can be used as a pair.
The output frequency depends on the acceleration and deceleration time. Be sure to set b1-02 (Run Command
selection) to 1 (Control circuit terminal).
„ Related Parameters
„ Precautions
When setting and using UP and DOWN Commands, observe the following precautions.
Setting Precautions
If multi-function input terminals S3 to S12 are set as follows, operation error OPE03 (Invalid multi-function
input selection) will occur:
• Only either the Up Command or Down Command has been set.
• Up/Down Commands and Accel/Decel Ramp Hold have been allocated at the same time.
Parameter
Number
Name
Description
Setting
Range
Default
Change
during
Run
Control Methods
Display V/f
Open
Loop
Vector
Flux
Vector
d2-01
Frequency Refer-
ence Upper Limit
Set the output frequency upper limit as a per-
cent, taking the max. output frequency to be
100%.
0.0 to
110.0
100.0% No A A A
Ref Upper Limit
d2-02
Frequency Refer-
ence Lower Limit
Sets the output frequency lower limit as a per-
centage of the maximum output frequency. 0.0 to
110.0
0.0% No A A A
Ref Lower Limit
d2-03
Master Speed Ref-
erence Lower
Limit
Set the master speed reference lower limit as a
percent, taking the max. output frequency to
be 100%.
0.0 to
110.0
0.0% No A A A
Ref1 Lower Limit