24 Rockwell Automation Publication 20C-PM001F-EN-P - March 2012
Chapter 2 Programming and Parameters
Speed Command File
File
Group
No.
Parameter Name & Description Values
Related
SPEED COMMAND
Spd Mode/Limits
079 [Speed Units]
Selects the units to be used for all speed related
parameters. Options 0 & 1 indicate status only.
Options 2 & 3 will convert/configure the drive for
that selection.
“Convert Hz” (2) - converts all speed based
parameters to Hz, and changes the value
proportionately (i.e. 1800 RPM = 60 Hz).
“Convert RPM” (3) - converts all speed based
parameters to RPM, and changes the value
proportionately.
Note: This parameter does not get changed with a
“Reset to Defaults”.
Default:
Options:
0
0
1
2
3
“Hz”
“Hz”
“RPM”
“Convert Hz”
“Convert RPM”
080 [Feedback Select]
Selects the source for motor speed feedback.
“Open Loop” (0) - no encoder is present, and slip
compensation is not needed.
“Slip Comp” (1) - tight speed control is needed,
and encoder is not present.
Default:
Options:
0
0
1
“Open Loop”
“Open Loop”
“Slip Comp”
152
081 [Minimum Speed]
Sets the low limit for speed reference after scaling
is applied. Refer to parameter 083 [Overspeed
Limit].
Default:
Min/Max:
Units:
0.0
0.0/[Maximum Speed]
0.1 Hz
0.1 RPM
079
083
092
095
082 [Maximum Speed]
Sets the high limit for speed reference after
scaling is applied. Refer to parameter 083
[Overspeed Limit].
Default:
Min/Max:
Units:
50.0 or 60.0 Hz (volt class)
[Motor NP RPM]
5.0/320.0 Hz
75.0/19200.0 RPM
0.1 Hz
0.1 RPM
055
079
083
091
094
083 [Overspeed Limit]
Sets the incremental amount of the output
frequency (above [Maximum Speed]) allowable
for functions such as slip compensation.
[Maximum Speed] + [Overspeed Limit] must be
≤[Maximum Freq]
Default:
Min/Max:
Units:
10.0 Hz
300.0 RPM
0.0/20.0 Hz
0.0/600.0 RPM
0.1 Hz
0.1 RPM
055
079
082
084
085
086
[Skip Frequency 1]
[Skip Frequency 2]
[Skip Frequency 3]
Sets a frequency at which the drive will not
operate. [Skip Frequency x] and [Skip Frequency
Band] must not equal 0.
Default:
Default:
Default:
Min/Max:
Units:
Based on Drive Rating
0.0 Hz
0.0 Hz
–/+[Maximum Speed]
0.1 Hz
087
087 [Skip Freq Band]
Determines the bandwidth around a skip
frequency. [Skip Freq Band] is split, applying 1/2
above and 1/2 below the actual skip frequency.
The same bandwidth applies to all skip
frequencies.
Default:
Min/Max:
Units:
0.0 Hz
0.0/30.0 Hz
0.1 Hz
084
085
086
32
32
32
Allowable Output Frequency Range
Bus Regulation or Current Limit
Voltage
Frequency
Allowable Output Frequency Range
Normal Operation
Allowable Reference Frequency Range
Frequency Trim due to
Speed Control Mode
Motor Volts
Break Volts
Start Boost
0 Min
Speed
Motor
Hz
Max
Speed
Output
Freq Limit
Max
Freq
Break
Frequency
Overspeed
Limit
32
32
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