Rs485 (Dsi) Protocol; Network Wiring - Gram IF 4000 Manual De Uso

RS485 (DSI) Protocol

PowerFlex 4 drives support the RS485 (DSI) protocol to allow efficient
operation with Rockwell Automation peripherals. In addition, some
Modbus functions are supported to allow simple networking. PowerFlex
4 drives can be multi-dropped on an RS485 network using Modbus
protocol in RTU mode.
Controller

Network Wiring

Network wiring consists of a shielded 2-conductor cable that is
daisy-chained from node to node.
Figure C.1 Network Wiring Diagram
PowerFlex 4
Master
TxRxD+
120 ohm resistor
TxRxD-
Shield
NOTE: The shield is connected at ONLY ONE end of each cable segment.
Only pins 4 and 5 on the RJ45 plug should be wired. The other pins on
the PowerFlex 4 RJ45 socket contain power, etc. for other Rockwell
Automation peripheral devices and must not be connected.
Wiring terminations on the master controller will vary depending on the
master controller used and "TxRxD+" and "TxRxD-" are shown for
illustration purposes only. Refer to the master controller's user manual
for network terminations. Note that there is no standard for the "+" and
"-" wires, and consequently Modbus device manufacturers interpret
them differently. If you have problems with initially establishing
communications, try swapping the two network wires at the master
controller.
Standard RS485 wiring practices apply. Termination resistors need to be
applied at each end of the network cable. RS485 repeaters may need to
be used for long cable runs, or if greater than 32 nodes are needed on the
network.
PowerFlex 4
Node 1 Node 2
TxRxD+
4
TxRxD-
5
Shield
X X
Appendix
PowerFlex 4
Node "n"
TxRxD+
4 4
TxRxD-
5 5
Shield
X
C
120 ohm resistor
FRONT
1