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550-UH User’s Manual
Embedded fieldbus
State Diagram
-&,
drives profile
To illustrate the operation of the state diagram, the following example (
ABB
DRV
LIM
implementation of the
a JCI
Drives profile) uses the control word to start the drive:
•
First, the requirements for using the
CONTROL
WORD
must be met. See above.
•
When the power is first connected, the state of the drive is not ready to switch on.
See dotted lined path (
) in the state diagram below.
•
Use the
CONTROL
WORD
to step through the state machine states until the
OPERATING
state is reached, meaning that the drive is running and follows the
given reference. See table below.
Step
CONTROL
WORD
Value
Description
1
CW = 0000 0000 0000 0110
This CW value changes the drive state to
READY
TO
SWITCH
ON
.
2
Wait at least 100 ms before proceeding.
3
CW = 0000 0000 0000 0111
This CW value changes the drive state to
READY
TO
OPERATE
.
4
CW = 0000 0000 0000 1111
This CW value changes the drive state to
OPERATION
ENABLED
.
The drive starts, but will not accelerate.
5
CW = 0000 0000 0010 1111
This CW value releases the ramp function generator (RFG)
output, and changes the drive state to
RFG
:
ACCELERATOR
ENABLED
.
6
CW = 0000 0000 0110 1111
This CW value releases the ramp function generator (RFG)
output, and changes the drive state to
OPERATING
. The drive
accelerates to the given reference and follows the reference.
bit 0
bit 15
Содержание Johnson Controls AYK550-UH
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