UD78 User Guide
Issue code: 78nu2
14
Group 1
Group 2
System
controller
Line
repeater
Line
repeater
Figure 5 RS485 multi-drop link having two groups of four units
Serial communications modes
The serial communications interface can be set up for operation in the
following modes:
2-wire ANSI Half-duplex communications (transceiver mode)
4-wire ANSI Half-duplex communications, independent RX and TX channels
Output The Drive is to control another Drive (CT protocol)
Input The Drive is to be controlled by another Drive (CT protocol)
Make connections as shown in Figure 6, 7 or 8 as required. If the Drive is to
be set up using Unisoft on a PC, see Appendix B
Setting up the Drive using
Unisoft
.
