Emerson Unidrive M701 - Page 150

150 SI-Ethernet User Guide
Issue: 1
The individual bit functions are described as follows:
The individual bit functions for the drive control word are shown in Table 7.10 below.
Speed reference (SpeedRef)
The speed reference word utilises 2 bytes (16 bits) as shown below.
For more information on the setting of the speed reference see section 7.31 AC/DC
Drive object attributes on page 174.
Name Control Word Description
RunFwd b0
Set this bit to command the drive to run in the
forward direction.
FaultRst b2
A 0 to 1 transition will reset the drive if the drive was
in a trip state.
For the drive to run at the speed specified in Word 1, Pr 0.06.043 must be ON and bit 0,
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.
Table 7.10 Drive control word bit functions
Bit Function Equivalent parameter
0 Drive enable Pr 0.06.015
1 Run forward Pr 0.06.030
2 Jog forward Pr 0.06.031
3 Run reverse Pr 0.06.032
4 Forward/reverse Pr 0.06.033
5Run Pr 0.06.034
6 Not stop Pr 0.06.039
7 Auto/manual N/A
8 Analog/preset reference Pr 0.01.042
9 Jog reverse Pr 0.06.037
10 Reserved N/A
11 Reserved N/A
12 Trip drive N/A
13 Reset drive Pr 0.10.033
14 Keypad watchdog N/A
b15 b14 b13 b12 b11 b10 b9 b8
SpeedRef (high byte)
b7 b6 b5 b4 b3 b2 b1 b0
SpeedRef (low byte)
NOTE