User guide

MDX-ETHERNET User Guide 33
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The actual digital speed reference selected when ANALOG REF/PRESET REF is set to
1 will be Pr 1.21, which is also the default mapping for the fieldbus speed reference.
However Pr 1.15 can be used to change which of the digital references is selected. For
further details on the drive digital speed reference, please refer to the appropriate drive
user guide.
Table 9.2 lists in detail the function of each control word bit. For further in-depth details
about drive control words and sequencing bits please refer to the appropriate drive User
and Advanced User Guides.
By default data compression is off and therefore the control word will be cast as 32-bit
with bits 16 to 31 reserved.
Table 9.2 control word bit functions
Bit Function Description
0 ENABLE
Set to 1 to enable the drive. Resetting to 0 will immediately disable the drive,
and the motor will coast to a stop. The external HARDWARE ENABLE signal
must also be present before the drive can be enabled.
1 RUN FWD
Set to 1 (with ENABLE set to 1) to run the motor in the forward direction. When
reset to 0, the drive will decelerate the motor to a controlled stop.
2 JOG FWD
Set to 1 to jog the motor forward. This signal needs to be used in conjunction
with the ENABLE bit. This signal is overridden by a RUN, RUN REV or RUN
FWD signal.
3RUN REV
Set to 1 (with ENABLE set to 1) to run the motor in the reverse direction. When
reset to 0, the drive will decelerate the motor to a controlled stop.
4FWD REV
Set to 1 to select the reverse direction. Set to 0 to run in the forward direction.
The RUN signal is used to start and stop the motor
5 RUN
Set to 1 to run the motor. FWD REV is used to select the direction of motor
rotation. When reset to 0, the drive will decelerate the motor to a controlled
stop.
6 Reserved
7 Reserved
8
Analog
ref./Preset
ref.
Set to 1 to select digital speed reference 1 (Pr 1.21), and reset to 0 to select
analog reference 1 (Pr 1.36). ANALOG REF/PRESET REF directly controls Pr
1.42, so reference selector (Pr 1.14) and preset selector (Pr 1.15) must both be
set to 0 (default) for the ANALOG REF/PRESET REF bit to work properly.
9 Reserved
10 Reserved
11 Reserved
12 Reserved
13
Drive
reset
A 0-1 transition of the RESET bit will reset the drive from a trip condition. If the
reason for the trip is still present, or another fault condition has been detected,
the drive will immediately trip again. When resetting the drive, it is
recommended to check the status word to ensure that the reset was
successful, before attempting to re-start the drive.
14 Reserved
15 Reserved
NOTE