ACH550-UH User’s Manual 195
Serial Communication – FBA
• The serial communication channel is defined as the source for controlling
commands from EXT1 (set using parameters 1001 EXT1 COMMANDS and 1102
EXT1/EXT2 SEL).
• The external plug-in fieldbus adapter is activated:
– Parameter 9802 COMM PROT SEL = 4 (EXT FBA).
– The external plug-in fieldbus adapter is configured to use the drive profile
mode or drive profile objects.
The content of the CONTROL WORD depends on the protocol/profile used. See the
user’s manual provided with the FBA module and/or the "ABB Drives Profile
Technical Data".
Status Word
The STATUS WORD is a 16-bit word containing status information, sent by the drive to
the fieldbus controller. The content of the
STATUS WORD depends on the protocol/
profile used. See the user’s manual provided with the FBA module and/or the "ABB
Drives Profile Technical Data" section.
Reference
The contents of each REFERENCE word:
• Can be used, as speed or frequency reference.
• Is a 16-bit word comprised of a sign bit and a 15-bit integer.
• Negative references (indicating reversed rotation direction) are indicated by the
two’s complement of the corresponding positive reference value.
The use of a second reference (REF2) is supported only when a protocol is
configured for the ABB Drives profile.
Reference scaling is fieldbus type specific. See the user’s manual provided with the
FBA module and/or the following sections as appropriate:
• "ABB Drives Profile Technical Data"
• "Generic Profile Technical Data"
Actual Values
Actual Values are 16-bit words containing information on selected operations of the
drive. Drive Actual Values (for example, group 01 parameters) can be mapped to
Input Words using group 51 parameters (protocol-dependent, but typically
parameters 5104…5126).
Planning
Network planning should address the following questions:
• What types and quantities of devices must be connected to the network?
• What control information must be sent down to the drives?
• What feedback information must be sent from the drives to the controlling
system?
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