D: Reference; D1: Frequency Reference - Omron Q2A Series Technical Manual

12.4 d: REFERENCE

12.4

d: REFERENCE

d parameters 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. Always check the operation of any fast stop circuits after they are wired. Fast stop
circuits are required to provide safe and quick shutdown of the drive. Prepare to initiate an emergency stop during the test run.
Operating a drive with untested emergency circuits could result in death or serious injury.
WARNING! Crush Hazard. Do not use this drive in lifting applications without installing external safety circuitry to prevent
accidental dropping of the load. The drive does not possess built-in load drop protection for lifting applications. Install electrical
and/or mechanical safety circuit mechanisms independent of drive circuitry. Failure to comply could result in death or serious
injury from falling loads.
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d1: FREQUENCY REFERENCE

Figure 12.53 shows the frequency reference input method, command source selection method and priority
descriptions.
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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.
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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 AI1 and AI3 to -10 V to +10 V
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Figure 12.53 Frequency Reference Setting Hierarchy
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual