Communication Set-Up – Efb - ABB ACS550-01 User Manual

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• To reduce noise on the network, terminate the RS485 network using 120 Ω
resistors at both ends of the network. Use the DIP switch to connect or disconnect
the termination resistors. See following diagram and table.
Terminated
X1
28
29
30
31
32
• Connect the shield at each end of the cable to a drive. On one end, connect the
shield to terminal 28, and on the other end connect to terminal 32. Do not connect
the incoming and outgoing cable shields to the same terminals, as that would
make the shielding continuous.
• For configuration information see the following:
– "Communication Set-up – EFB" below.
– "Activate Drive Control Functions – EFB" on page 152.
– The appropriate EFB protocol specific technical data. For example, "Modbus
Communication Set-up – EFB
Serial Communication Selection
To activate the serial communication, set parameter 9802
1 (
STD MODBUS
Note! If you cannot see the desired selection on the panel, your drive does not have
that protocol software in the application memory.
Embedded Fieldbus
Station
Station
Identification
Screen
RS485 Multidrop application
B (Positive +)
SCR
+
A (Negative -)
-
AGND
GND
SCR
Screen
+
-
GND
Protocol Technical Data" on page 160.
).
Station
Hardware Description
28 SCR
29 B
30 A
31 AGND
32 SCR
ACS550 User's Manual
Terminated
Station
RS485 interface
J2 J2
ON
ON
OFF position ON position
Bus termination
=
COMM PROTOCOL SEL