D: References; D1: Frequency Reference - YASKAWA GA800 Programming Manual

2.5 d: References

2.5

d: References

d parameters [References] set the frequency reference input method and dead band range. They also set torque
control, field weakening, and field forcing functions.
WARNING! Sudden Movement Hazard. Use fast stop circuits to safely and quickly stop the drive. After you wire the fast stop
circuits, you must check their operation. Test the operation of the fast stop function before you use the drive. If you do not test the
fast stop circuit before you operate the drive, it can cause serious injury or death.
◆

d1: Frequency Reference

Figure 2.59 shows the frequency reference input method, command source selection method and priority descriptions.
■
Multi-Step Speed Operation
The drive has a multi-step speed operation function that can set many frequency references in advance. Set frequency
references in d1-xx parameters. You can select the set frequency references with MFDI signals from an external
source. Activate and deactivate the digital input to select the frequency reference to change the motor speed in steps.
You can use the 16-step frequency reference and one Jog Frequency Reference (JOG command) to switch the speed to
the maximum 17-step speeds.
Note:
• The Jog Frequency Reference (JOG command) overrides all other frequency references.
• You can use the MFDI to switch the frequency reference when the motor is running. The drive will apply the enabled acceleration and
deceleration times.
• The default settings for Multi-Step Speed Reference 1 (master frequency reference) and Multi-Step Speed Reference 2 (auxiliary frequency
reference) are the analog frequency reference.
Also, voltage command input terminal A1 and current input terminal A2 for Multi-Step Speed Reference 1 (master frequency reference) are
added internally by default. The drive uses Multi-Step Speed Reference 1 when the signal is connected to an analog input terminal.
■
Setting Procedures for Multi-step Speed Operation
Use an Analog Input as Reference 1 and 2
This section gives information about the procedures to set these examples:
• Multi-Step Speed 6 (6 types of frequency references)
• When you set the voltage input of analog inputs from terminals A1 and A3 to -10 V to +10 V
274
Figure 2.59 Frequency Reference Setting Hierarchy
YASKAWA TOEPYAIGA8002B GA800 Drive Programming