Emerson Unidrive M700 User Manual page 151

7.5.10 Extended speed control
Output assembly object 0x15 (21
The PLC or scanner must be configured for 4 output bytes (or 2 output words) if this
assembly object is to be used.
Table 7.11 Extended speed control
Data word
Word 0
Word 1
Extended control word
The extended control word consists of 2 bytes (16 bits), with only the low byte used as
shown.
b15
b7
The individual bit functions are described as follows:
Name
RunFwd
RunRev
FaultRst
NetCtrl
NetRef
For the drive to run at the speed specified in Word 1, Pr 0.06.043 must be ON and bit 0,
NOTE
bit 7 and bit 8 of the drive control word (Pr 0.06.042) must all be set to 1 and the external
hardware enable signal must be present.
For information on the drive control word see Table 7.10 Drive control word bit
NOTE
functions on page 150.
Speed reference (SpeedRef)
The speed reference word utilises 2 bytes (16 bits) as shown below.
b15
b7
SI-Ethernet User Guide
Issue: 1
Function
Extended control word.
Speed reference (SpeedRef).
b14 b13
b6 b5
NetRef NetCtrl
Control
Word
b0 Set this bit to command the drive to run in the forward direction.
b1 Set this bit to command the drive to run in the reverse direction.
A 0 to 1 transition will reset the drive if the drive was in a trip
b2
state.
Used in conjunction with Pr 0.06.043 to enable the drive control
b5
word bits b0-b6 and bit 9 (Pr 0.06.042).
Set this bit to command the drive to use the remote speed
b6
reference value specified in Word 1.
b14 b13
SpeedRef (high byte)
b6 b5
)
10
b12 b11 b10
b4 b3
FaultRst RunRev RunFwd
Description
b12 b11
b4 b3
SpeedRef (low byte)
b9 b8
b2 b1 b0
b10 b9
b2 b1
b8
b0
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