Indulogix ILVFE-1W0075, User Manual

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ILVFE-series
user manual
Appendix C - RS485 (Modbus) Protocol
ILVFE drives support the RS485 (DSI) protocol to allow efficient operation with Indulogix peripherals.
In addition, some Modbus functions are supported to allow simple networking to communicate with
other device like PLC controllers, HMI and PCs.
ILVFE drives can be multi-dropped on an RS485 network using Modbus protocol in RTU mode.
Network wiring
Network wiring consists of a shielded 2-conductor cable that is daisy-chained from node to node
Only pins 4 and 5 on the RJ45 plug should be wired. The other pins on the ILVFE RJ45 socket contain
power, etc. for other Indulogix 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.
•
Network wiring should be separated from power wires by at least 0.3 meters (1 foot).
•
Network wiring should only cross power wires at a right angle.
Control Terminal 16 on the ILVFE drive must also be connected to PE ground (there are two PE
terminals on the drive).
Network Common is internally tied to I/O Terminal 04 (Digital Common). Tying I/O Terminal 04 to PE
ground may improve noise immunity in some applications.