33
Installation
Modbus Communications
The drive’s serial communication protocol is Modbus RTU slave with a 32 bit data extension.
The Modbus protocol is available on most operator interface panels and PLC’s.
Control Techniques’ Motion Interface panels are supplied with a Modbus master
communications driver.
Multi-Drop Communications
The RS-485 option (pins 4 and 9) is provided for multi-drop configurations of up to 32 drives.
Control Techniques provides a special multi-drop serial cable which allows you to easily
connect two or more drives.
Figure 32: EN Multi-Drop Wiring Diagram
Serial Communications Specifications
Max baud rate 19.2k
Start bit 1
Stop bit 2
Parity none
Data 8
Note:
The terminating resistor packs, TERM-H
and TERM-T, should be installed on the
first (TERM-H) and last (TERM-T) drive in
the string if the total cable length is over
50 feet.
TIA-XXX
Serial Cable
TERM-H
TERM-T
DDS-XXX
Serial Cables
DDS-XXX
Serial Cables
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