Parameter and variable descriptions 6-7 – Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE User Manual
Page 63
PARAMETER AND VARIABLE DESCRIPTIONS
6-7
1557-UM050F-EN-P – June 2013
3 Speed Command Parameters
Preset Speed Command 1-3 [Preset speed 1-3]
Linear numbers:
33-35
Minimum value:
0.5 Hz
Maximum value:
90.0 Hz
Default values:
30.0/40.0/50.0 Hz
These three parameters specify preset speed commands that can be selected by the logic command word.
Preset Jog Speed [Preset jog speed]
Linear number:
40
Minimum value:
1 Hz
Maximum value:
60 Hz
Default value:
6.0 Hz
This parameter specifies the preset jog speed command, which is selected by the logic command word.
Speed Command 0 Minimum [Speed cmd 0 min]
Linear number:
41
Minimum value:
-127.0 Hz
Maximum value:
127.0 Hz
Default value:
6.0 Hz
This parameter specifies the value of speed command corresponding to 0.00V on analog input 1L. The
required value can be calculated using the following formula:
Speed cmd 0 min = fmin - [vmin x (fmax-fmin) / (vmax-vmin)]
fmin is the minimum operating speed
fmax is the maximum operating speed
vmin is the voltage corresponding to minimum operating speed
vmax is the voltage corresponding to maximum operating speed
Speed Command 0 Maximum [Speed cmd 0 max]
Linear number:
42
Minimum value:
0.0 Hz
Maximum value:
127.0 Hz
Default value:
60.0 Hz
This parameter specifies the value of speed command corresponding to 10.00V on analog input 1L. It may be
less than Speed Command 0 Minimum. The required value can be calculated using the following formula:
Speed cmd 0 max = fmin + [(10V-vmin) x (fmax-fmin) / (vmax-vmin)]
The terms are as defined in the description of parameter Speed Command 0 Minimum.
Speed Command 8 Minimum [Speed cmd 8 min]
Linear number:
43
Minimum value:
-127.0 Hz
Maximum value:
127.0 Hz
Default value:
6.0 Hz
This parameter specifies the value of speed command corresponding to 0.00V on analog input 1M. The
required value can be calculated as described for parameter Speed Command 0 Minimum.
Speed Command 8 Maximum [Speed cmd 8 max]
Linear number:
44
Minimum value:
0.0 Hz
Maximum value:
127.0 Hz
Default value:
60.0 Hz
This parameter specifies the value of speed command corresponding to 10.00V on analog input 1M. It may be
less than Speed Command 8 Minimum. The required value can be calculated as described for parameter
Speed Command 0 Maximum.