ABB ACH550-UH User Manual page 535

ACH550 E-Clipse Bypass User's Manual
State Diagram
ABB drives profile
To illustrate the operation of the state diagram, the following example (
implementation of the ABB Drives profile) uses the control word to start the system:
• First, the requirements for using the
• When the power is first connected, the state of the bypass is not ready to switch
on. See dotted lined path (
• Use the
OPERATING
given reference. See table below.
Step
1
2
3
4
5
6
to step through the state machine states until the
CONTROL WORD
state is reached, meaning that the bypass is running and follows the
CONTROL WORD Value
CW = 0000 0000 0000 0110
bit 15 bit 0
CW = 0000 0000 0000 0111
CW = 0000 0000 0000 1111
CW = 0000 0000 0010 1111
CW = 0000 0000 0110 1111
CONTROL WORD
) in the state diagram below.
Description
This CW value changes the bypass state to
.
ON
Wait at least 100 ms before proceeding.
This CW value changes the bypass state to
.
OPERATE
This CW value changes the bypass state to
. The drive starts, but will not accelerate.
ENABLED
This CW value releases the ramp function generator (RFG)
output, and changes the drive state to
.
ENABLED
This CW value releases the ramp function generator (RFG)
output, and changes the bypass state to
bypass accelerates to the given reference and follows the
reference.
ABB DRV LIM
must be met. See above.
READY TO SWITCH
READY TO
OPERATION
:
RFG ACCELERATOR
. The
OPERATING
Embedded fieldbus
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