ABB DriveIT ACH550-01 User Manual page 164

Speed Reference.The Speed Reference is a 16-bit words
comprising of a sign bit and a 15-bit integer. A negative
reference (indicating reversed rotation direction) is indicated by
the two's complement of the corresponding positive reference
value. The scaling of the Speed Reference is fieldbus type
specific. Refer to the fieldbus user's manual for a detailed
description on the scaling of the
The use of REF2 is not supported by the Generic Drive Profile.
Reference scaling. The scaling of the Speed Reference is
fieldbus type specific. However the relation of 100% reference
towards the drive is fixed as described in the table below. Refer
to the fieldbus user's manual for a detailed description on the
range and scaling of the
Reference Range
REF Fieldbus
specific
Actual Values. Actual Values are 16-bit words containing
information on selected operations of the drive. The mapping of
the actual values is realised with the parameters of group 51.
The scaling of the integers sent to the fieldbus controller as
Actual Values depends on the selected drive parameter; please
refer to the section "Parameter listing and descriptions".
160
SPEED REFERENCE
SPEED REFERENCE
Reference
type
Speed -100% = -[par. 9908]
0 = 0
+100 = [par. 9908]
Frequency -100% = -[par. 9907]
0 = 0
+100 = [par. 9907]
ACH550 User's Manual
.
.
Scaling
Final reference
limited by
1104/1105.
Actual motor
speed limited
by 2001/2002
[speed].
Final reference
limited by
1104/1105.
Actual motor
speed limited
by 2007/2008
[frequency].
Serial communications
Remarks