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46
SI-DeviceNet User Guide
Issue Number: 2
By default data compression is off and therefore the control word will be cast as 32 bit
with bits 16-31 reserved.
Table 8.2 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.
3
RUN 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.
4
FWD 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
NOT
STOP
Set to 1 to allow the sequencing bit in the drive to be latched. Refer to the drive
Advanced User Guide
for more details. If NOT STOP is zero, all latches are
cleared and held at 0. Pr
06.004
must be correctly set for this to function.
7
AUTO
Set to 1 to enable fieldbus control of the drive Control Word. The Control Word
Enable (Pr
06.043
) must also be set to 1. When reset to 0, the drive will oper-
ate under terminal control.
8
REMOTE
Set to 1 to select digital speed reference 1 (Pr
01.021
), and to 0 to select ana-
log reference 1 (Pr
01.036
). REMOTE directly controls Pr
01.042
, so reference
selector (Pr
01.014
) and preset selector (Pr
01.015
) must both be set to 0
(default) for the REMOTE bit to work properly.
9
JOG REV
Set to 1 to jog the motor in reverse. This signal needs to be used in conjunction
with the ENABLE bit. This signal is overridden by a RUN/RUN REV/RUN FWD
command.
10
Reserved
11
Reserved
12
TRIP
Set to 1 to trip the drive at any time. The trip display on the drive will be “Con-
trol Word” and the trip code will be 35. AUTO (b7) has no effect on this func-
tion. The trip cannot be cleared until TRIP is reset to 0.
13
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 recom-
mended to check the status word to ensure that the reset was successful,
before attempting to re-start the drive.
14
KEYPAD
WDOG
This watchdog is provided for an external keypad or other devices where a
break in the communication link must be detected. The watchdog system can
be enabled and/or serviced if this bit is changed from zero to one while the
control word enabled.
Once the watchdog is enabled it must be serviced at least once every second
or an “Watchdog” trip will occur. The watchdog is disabled when a “Watchdog”
trip occurs, and so it must be re-enabled when the trip is reset.
15
Reserved
NOTE
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