Functional Description 1-3
7000-TD002A-EN-P – September 2007
Speed Command The function of Speed Command block is to select one of the 10
possible speed command inputs. Parameter Speed Ref Select (7) in
conjunction with Local/Remote selector switch is used to define the
speed command input Speed Command In (276). When the selector
switch is in Local position, the default speed command is the Analog
Speed Potentiometer typically mounted on the LV panel. When the
selector switch is in Remote position, the parameter Speed Ref Select
defines the source of speed command. The options available are:
Local ( Speed Potentiometer)
3 DPI commands ( DPIAdapter1, DPIAdapter2, DPIAdapter5)
2 Analog Inputs configured either for 0-10V or 4-20mA (Analog
Inp1, Analog Inp2)
3 Preset speeds (Preset Spd 1, Preset Spd 2, Preset Spd 3)
1 Preset Jog
In addition, the speed command can come from a built in PID
controller.
The above speed commands are used when the drive is in Normal
mode of operation. However PF7000 has many special modes of
operation e.g. test modes or auto-tuning for which different speed
commands are selected. Table 1.A summarizes the speed command
during these special modes.
Table 1.A – Speed Commands for special operating modes of PF7000
Special operating modes of PF7000 Speed Command In(276)
DC test mode Rated line frequency
Open Circuit Rated Line Freq (17)
Open Loop 0.1 x Rated Line Freq (17)
Rs autotune 2Hz
Ls autotune Rated Line Freq (17)
Flux Reg autotune Autotune Spd Cmd (213)
Speed Reg autotune Autotune Spd Cmd (213)
Sync transfer requested Bypass Frequency (159)
The selected Speed Command In is clamped to a minimum and a
maximum level by parameter Speed Cmd Max (290) and Speed Cmd
Min (293) to give Speed Command (277). The maximum value of
Speed Command cannot be greater than 125% of Base Speed (98).
Note: Contact the factory for applications that require output
frequencies greater than 125% of the motor base speed.
Contact factory for the availability of this feature.
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