To Terminate The Inverter Network; Table 6-1. Maximum Network Length Per Modbus Bit Rate; Figure 6-8. Termination Switches On The User Interface Pcb - Advanced Energy AE 600 User Manual

Advanced Energy
Figure 6‑8. Termination switches on the user interface PCB
The performance of your Modbus network may require each end of the network to be
terminated using 120 Ω termination resistors. When the network is long, relative to
the RS-485 bit rate in use, bus terminations must be installed. The network length is
determined by the total backbone cable length and not necessarily the line-of-sight
between the two furthest apart devices.
Table 6‑1. Maximum network length per Modbus bit rate
RS-485/Modbus Bit
Rate
9600 bps
19,200 bps
38,400 bps
57,600 bps

TO TERMINATE THE INVERTER NETWORK

If bus termination is desired and the inverter is on the end of the Modbus network,
you need to set the termination.
On the front of the user interface PCB, using the Modbus Termination switches:
• Place the Line switch in the On position.
6‑10
Maximum Network
Length Without
Termination in Feet
(Meters)
1000 (305)
500 (152)
250 (76)
150 (46)
Data Monitoring and Controls
Termination DIP switches
Maximum Network
Length With Termination
in Feet (Meters)
4000 (1200)
4000 (1200)
4000 (1200)
4000 (1200)
570-1001791-05A