Communication Set-Up – Efb; Serial Communication Selection - ABB ACS550 User Manual

ACS550 User's Manual
• 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 sections:
–
–
– The appropriate EFB protocol specific technical data. For example,
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.
station
Station
Identification
Screen
RS485 Multidrop application
B (Positive +)
SCR
+
A (Negative -)
-
AGND
GND
SCR
Screen
+
-
GND
Communication set-up – EFB
Activate drive control functions – EFB
protocol technical data
).
Station
Hardware description
28 SCR
29 B
30 A
31 AGND
32 SCR
on page 191
on page
on page 201.
Terminated
station
RS485 interface
J2
ON
OFF position ON position
Bus termination
193
Modbus
=
COMM PROT SEL
Embedded fieldbus
191
J2
ON