172 SI-Ethernet User Guide
Issue: 3
Speed feedback (SpeedActual)
The speed feedback word utilises 2 bytes (16 bits) as shown below.
For more information on the speed feedback see section 7-31 AC/DC Drive object attributes on
page 187.
7.5.15 Basic speed and torque feedback
Input assembly object 0x48 (72
10
)
The PLC or scanner must be configured for 6 input bytes (or 3 input words) if this assembly object
is to be used.
Basic status word
The basic status word consists of 2 bytes (16 bits), with only the low byte used as shown below.
The individual bit functions are described as follows:
b15 b14 b13 b12 b11 b10 b9 b8
SpeedActual (high byte)
b7 b6 b5 b4 b3 b2 b1 b0
SpeedActual (low byte)
Table 7-17 Basic speed and torque feedback
Data word Function
Word 0 Basic status word.
Word 1 Speed feedback (SpeedActual).
Word 2 Torque feedback (TorqueActual).
b15 b14 b13 b12 b11 b10 b9 b8
b7 b6 b5 b4 b3 b2 b1 b0
Running1
(Fwd)
Faulted
Bit Name Description
b0 Faulted
Indicates whether the drive is OK or tripped
(0=OK, 1=Tripped).
b2
Running1
(Fwd)
Indicates if the drive is running in the forward direction
(0=False, 1=True).
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