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44 Modbus/TCP – Communication profiles
State machine
State machine
The state machine for the ABB Drives communication profile is
The state machine for the ABB Drives communication profile is shown below.
shown below.
MAINS OFF
Power ON
A B C D
(CW Bit3=0)
OPERATION
INHIBITED
operation
inhibited
from any state
OFF1 (CW Bit0=0)
OFF1
ACTIVE
(SW Bit1=0)
n(f)=0 / I=0
B C D
(CW Bit4=0)
(CW Bit5=0)
(CW Bit6=0)
References
￭
References are 16-bit words containing a sign bit and a 15-bit integer. A negative
reference (indicating reversed direction of rotation) is formed by calculating the two's
complement from the corresponding positive reference.
ABB drives can receive control information from multiple sources including analog
and digital inputs, the drive control panel and a fieldbus adapter module (for example,
FMBT-21). To have the drive controlled through the fieldbus, you must select the module
as the source for control information, for example, reference.
PROFINET IO – Communication profiles 61
SWITCH-ON
INHIBITED
(CW Bit0=0)
NOT READY TO
SWITCH ON
(CW=xxxx x1xx xxxx x110)
READY TO
SWITCH ON
(SW Bit2=0)
(CW=xxxx x1xx xxxx x111)
READY TO
OPERATE
(CW=xxxx x1xx xxxx 1111
and SW Bit12=1)
from any state
(CW Bit3=1
and
SW Bit12=1)
ACTIVE
OPERATION
C D
ENABLED
A
(CW=xxxx x1xx xxx1 1111)
RFG: OUTPUT
D
ENABLED
B
(CW=xxxx x1xx xx11 1111)
RFG: ACCELERATOR
ENABLED
C
(CW=xxxx x1xx x111 1111)
OPERATION
D
(SW Bit6=1)
communication
CW = Control word
(SW Bit0=0)
SW = Status word
n = Speed
I = Input current
RFG = Ramp function
generator
f = Frequency
(SW Bit0=1)
from any state
FAULT
(SW Bit1=1)
from any state
Emergency stop
OFF3 (CW Bit2=0)
OFF2
OFF3
ACTIVE
(SW Bit5=0)
n(f)=0 / I=0
(SW Bit2=1)
(SW Bit8=1)
ABB Drives
profile
Fault
(SW Bit3=1)
(CW Bit7=1)
Emergency OFF
OFF2 (CW Bit1=0)
(SW Bit4=0)
state
condition
rising edge
of
the bit
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