ABB ACS850 User Manual

328 Control through the embedded fieldbus interface
 Actual values for the ABB Drives profiles
Both the ABB Drives classic profile and ABB Drives enhanced profile support the use
of two fieldbus actual values, ACT1 and ACT2. The actual values are 16-bit words
each containing a sign bit and a 15-bit integer. A negative value is formed by
calculating the two’s complement from the corresponding positive value.
The drive signals are scaled before they are written into fieldbus actual values, ACT1
and ACT2. Parameters 50.04 Fb ref1 modesel and 50.05 Fb ref2 modesel both select
the drive actual signals and define the scaling as follows:
• If you select value Speed, drive actual signal 01.01 Motor speed rpm is scaled
and written to the fieldbus actual value. The table below shows the scaling:
• If you select value Torque, drive actual signal 01.06 Motor torque
is scaled and
written to the fieldbus actual value. The table below shows the scaling:
• If you select value Raw data, the fieldbus actual value ACT1 or ACT2 is the drive
actual value without scaling.
Value of 01.01 Motor speed rpm [rpm] Corresponding fieldbus actual value
ACT1 or ACT2 [integer]
value of parameter 19.01 Speed scaling 20 000
00
-(value of parameter 19.01 Speed scaling)-20 000
Value of 01.06 Motor torque [%] Corresponding fieldbus actual value
ACT1 or ACT2 [integer]
100% of motor nominal torque 10 000
00
-(100% of motor nominal torque) -10 000
Drive value Corresponding fieldbus actual value
ACT1 or ACT2 [integer]
32 767 32 767
00
-32 768 -32 768

ABB ACS850 Specifications

General

Safety	STO (Safe Torque Off)
Communication	CANopen
Enclosure	IP21
Output Voltage	Up to 1000 V DC
Protection Features	Overcurrent, Overvoltage, Undervoltage
Cooling Method	Air or liquid cooling
Input Voltage	380 to 690 V AC