36
Direction Control
4.
Controlled by the Network
This configuration is used when it is desired to control the digital outputs over
network communications instead of a drive related function. In this case,
[Digital Out x Sel] is set to “Param Cntl,” in which case the bit value of [DigOut
Setpt], parameter 379 energizes the respective digital output. Bit 0 corresponds
to output 1. Bit 1 corresponds to output 2, and so on. To complete the
configuration for control over a network, a datalink must be established with
[Digital Out Setpt], parameter 379.
Example
Digital Output 2 controlled by Data In B1.
Setup
−
[Data In B1], parameter 302 = 379 ([Dig Out Setpt] as the Data In target)
−
[Digital Out2 Sel], parameter 384 = 30 “Param Cntl”
When Bit 1 of Data In B1 =1 Digital Out 2 will be energized.
Direction Control
Direction control of the drive is an exclusive ownership function. Only one device
can command direction at a time. Direction is defined as the forward (+) or reverse
(–) control of the drive output frequency, not motor rotation. Motor wiring and
phasing determines its CW or CCW rotation. Direction of the drive is controlled in
one of four ways:
1.
2-Wire digital input selection such as Run Forward or Run Reverse.
2.
3-Wire digital input selection such as Forward/Reverse, Forward or Reverse.
3.
Control Word bit manipulation from a DPI device such as a communications
interface. Bits 4 & 5 control direction. Refer to the
Logic Command Word
information in Appendix A of the PowerFlex 70 or 700 User Manual.
4.
The sign (+/-) of a reference signal, such as a bipolar analog input or the 16th bit
of a network reference.
Direction commands by various devices can be controlled using the [Direction
Mask]. See
page 49
for details on masks.
Refer to "Digital Inputs" on
page 26
and "Analog Inputs" on
page 4
for more detail
on the configuration and operating rules for direction control.
70EC
700VC
700H
✔ ✔