ACS550 User’s Manual 151
Embedded Fieldbus
Serial Communication Configuration
Setting 9802 automatically sets the appropriate default values in parameters that
define the communication process. These parameters and descriptions are defined
below. In particular, note that the station Id may require adjustment.
Note! After any changes to the communication settings, the protocol must be
reactivated by either cycling the drive power, or by clearing and then restoring the
station Id (5302).
Code Description
Protocol Reference
Modbus
5301 EFB PROTOCOL ID
Contains the identification and program revision of
the protocol.
Do not edit. Any non-zero value entered
for parameter 9802 COMM PROT SEL,
sets this parameter automatically. The
format is: XXYY, where xx = protocol ID,
and YY = program revision.
5302 EFB STATION ID
Defines the node address of the RS485 link.
Set each drive on the network with a
unique value for this parameter.
When this protocol is selected, the
default value for this parameter is: 1
Note! For a new address to take affect, the drive power must be cycled or 5302 must first be
set to 0 before selecting a new address. Leaving 5302 = 0 places the RS485 channel in reset,
disabling communication.
5303 EFB BAUD RATE
Defines the communication speed of the RS485
link in kbits per second (kbits/s).
When this protocol is selected, the
default value for this parameter is: 9.6
1.2 kbits/s
2.4 kbits/s
4.8 kbits/s
9.6 kbits/s
19.2 kbits/s
38.4 kbits/s
57.6 kbits/s
76.8 kbits/s
5304 EFB PARITY
Defines the data length, parity and stop bits to be
used with the RS485 communication.
• The same settings must be used in all on-line
stations.
0 = 8
N1 – 8 data bits, No parity, one stop bit.
1 = 8
N2 – 8 data bits, No parity, two stop bits.
2 = 8
E1 – 8 data bits, Even parity, one stop bit.
3 = 8
O1 – 8 data bits, Odd parity, one stop bit.
When this protocol is selected, the
default value for this parameter is: 1
5305 EFB CTRL PROFILE
Selects the communication profile used by the
EFB protocol.
0 = ABB DRV LIM – Operation of Control/Status
Words conforms to ABB Drives Profile, as used
in ACS400.
1 =
DCU PROFILE – Operation of Control/Status
Words conforms to 32-bit DCU Profile.
2 = ABB DRV FULL – Operation of Control/Status
Words conforms to ABB Drives Profile, as used
in ACS600/800.
When this protocol is selected, the
default value for this parameter is: 0