Allen-Bradley PowerFlex 20-HIM-A6, Руководство пользователя

Страница: 57 / 74

Rockwell Automation Publication 20HIM-UM001E-EN-P - May 2017 57
Using the HIM Chapter 4
Linking Parameters in
PowerFlex 700/700S Drives Most parameter values are entered directly by the user. However, specific
parameters can be ‘linked’, so the value of one parameter becomes the value of
another. For example, the value of an analog input can be linked to an
acceleration time. Rather than entering an acceleration time directly (via the
HIM), the link allows the value to change by varying the analog input signal. This
can provide additional flexibility for advanced applications.
Each link has two components:
• Source parameter—sender of information
• Destination parameter—receiver of information
Most parameters can be a source of data for a link, except parameters that use an
integer value representing an ENUM (text selection). These are not allowed,
since the integer is not actual data (it represents a value). See the drive
documentation for a list of parameters that can be destinations. All links must be
established between equal data types (parameter value formatted in floating point
can only source data to a destination parameter value that is also a floating point).
Establishing a Link
1. Access a valid destination parameter to be linked (for example, the Accel
Time 1 parameter 140 for a PowerFlex 700 drive or parameter 32 for a
PowerFlex 700S drive).
2. Press the LINK
soft key
to display the Link popup box for that parameter.
3. Enter the source parameter number (for example, the Analog In1 Value
parameter 16 for a PowerFlex 700 drive or parameter 801 for a PowerFlex
700S drive) to which you want to link the destination parameter.
4. Press the ENTER
soft key
.
The destination parameter screen reappears with the respective source
parameter value now mapped over the destination parameter range, and is
shown in destination parameter units. In this example, the value for
Analog Input 1 is 10.000 volts for a PowerFlex 700 drive, and is shown as
10.0 seconds.
ESC ENTER
Stopped
0.00 Hz
AUTO
F
Link Accel Time 1
0
0 << 1179
ESC
Stopped
0.00 Hz
AUTO
F
Port 00 Dev Param #140
Accel Time 1
10.0 Secs
LINK PAR#