Emerson unidrive m200 - Frequency Output or PWM Output Scaling; Maximum Output Frequency; Frequency Input High Precision;Maximum Reference Frequency; Frequency Reference Scaling;Frequency Reference

Parameter 03.037 Frequency Output or PWM Output Scaling
Short description Defines the scaling factor applied to the frequency or PWM output
Mode Open‑loop
Minimum 0.000 Maximum 4.000
Default 1.000 Units
Type 16 Bit User Save Update Rate Background
Display Format Standard Decimal Places 3
Coding RW, BU
Scale factor applied to the frequency or PWM output.
Parameter 03.038 Maximum Output Frequency
Short description Defines the maximum frequency required at the frequency output
Mode Open‑loop
Minimum 0 Maximum 3
Default 2 Units kHz
Type 8 Bit User Save Update Rate Background
Display Format Standard Decimal Places 0
Coding RW, TE, BU
Value Text Description
0 1 Fmax 1kHz
1 2 Fmax 2kHz
2 5 Fmax 5kHz
3 10 Fmax 10kHz
Defines the maximum frequency of the output for both frequency and PWM ouput modes as set by DigitalI/O01mode (08.031). For frequency mode ( DigitalI/O01mode (08.031) = 2 ) the choice of
maximum output frequency depends on the requirement of the output. Due to limitations in the hardware, higher output frequencies do not offer the best resolution at the top end of the frequency range.
The table below indicates the resolution at the programmed maximum frequency:
Fmax (kHz) Resolution at Fmax
1 14 bit
2 13 bit
5 12 bit
10 11 bit
Parameter 03.042 Frequency Input High Precision
Short description Increase the frequency input measuring window
Mode Open‑loop
Minimum 0 Maximum 1
Default 0 Units
Type 1 Bit User Save Update Rate Background
Display Format Standard Decimal Places 0
Coding RW
This bit should be set to 1 if a higher accuracy is required than that defined in MaximumReferenceFrequency (03.043). If FrequencyInputHighPrecision (03.042) = 1 then the frequency input
measurement window is doubled. This doubles the accuracy of the frequency input measurment but increases the response time by two also.
If FrequencyInputHighPrecision (03.042) = 0 then the frequency input measurement window is similar to Commander SK with better response time.
Parameter 03.043 Maximum Reference Frequency
Short description Defines the maximum frequency expected at the frequency input
Mode Open‑loop
Minimum 0.00 Maximum 100.00
Default 10.00 Units kHz
Type 16 Bit User Save Update Rate Background
Display Format Standard Decimal Places 2
Coding RW
Defines the maximum frequency expected at the frequency input. The time the frequency is measured over is defined by
Measurement Time = 2048 / Maximum reference frequency
With a maximum measurement time of 0.341 seconds.
2048 is used to give the measurement more stability. The output is 10 bits.
Maximum reference frequency of less than 6kHz will have a lower resolution.
Parameter 03.044 Frequency Reference Scaling
Short description Defines the scaling factor applied to the frequency reference
Mode Open‑loop
Minimum 0.000 Maximum 4.000
Default 1.000 Units
Type 16 Bit User Save Update Rate Background
Display Format Standard Decimal Places 3
Coding RW, BU
Scale factor applied to the frequency reference.
Parameter 03.045 Frequency Reference
Short description Displays the frequency reference
Mode Open‑loop
Minimum 0.00 Maximum 100.00
Default Units %
Type 16 Bit Volatile Update Rate 16ms
Display Format Standard Decimal Places 2
Coding RO, FI, ND, NC, PT
Indicates the reference input if Digitalinput5mode (08.035) = 4.
The reference has a 16ms filter.
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Unidrive M200 Parameter Reference Guide
Issue: 01.05.00.10