1-166 ACH550-UH User’s Manual
Parameters
Group 53: EFB PROTOCOL
This group defines set-up variables used for an embedded fieldbus (EFB)
communication protocol. The standard EFB protocol in the ACH550 is Modbus. See
chapter Embedded fieldbus page 1-185.
Group 53: EFB Protocol
Code Description Range Resolution Default S
5301 EFB PROTOCOL ID 0000…FFFF hex 1 0000 hex
Contains the identification and program revision of the protocol.
• Format: XXYY, where xx = protocol ID, and YY = program revision.
5302 EFB STATION ID 0…65535 1 1
Defines the node address of the RS485 link.
• The node address on each unit must be unique.
5303 EFB BAUD RATE 1.2, 2.4, 4.8, 9.6, 19.2, - 9.6 kb/s
38.4, 57.6, 76.8 kb/s
Defines the communication speed of the RS485 link in kbits per second (kb/s).
1.2 kb/s
2.4 kb/s
4.8 kb/s
9.6 kb/s
19.2 kb/s
38.4 kb/s
57.6 kb/s
76.8 kb/s
5304 EFB PARITY 0…3 1 0 (8
NONE 1)
Defines the data length, parity and stop bits to be used with the RS485 link communication.
• The same settings must be used in all on-line stations.
0 = 8
NONE 1 – 8 data bits, no parity, one stop bit.
1 = 8
NONE 2 – 8 data bits, no parity, two stop bits.
2 = 8
EVEN 1 – 8 data bits, even parity, one stop bit.
3 = 8
ODD 1 – 8 data bits, odd parity, one stop bit.
5305 EFB CTRL PROFILE 0…2 1 0 (
ABB DRV LIM)
Selects the communication profile used by the EFB protocol.
0 = ABB DRV LIM – Operation of Control/Status Words conforms to ABB Drives Profile (limited), as used in ACH400
and ACH550.
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 (full).
5306 EFB OK MESSAGES 0…65535 1 0
Contains a count of valid messages received by the drive.
• During normal operation, this counter is increasing constantly.
5307 EFB CRC ERRORS 0…65535 1 0
Contains a count of the messages with a CRC error received by the drive. For high counts, check:
• Ambient electro-magnetic noise levels – high noise levels generate errors.
• CRC calculations for possible errors.
5308 EFB UART ERRORS 0…65535 1 0
Contains a count of the messages with a character error received by the drive.
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