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How to Control the Frequenc...
5.4.2 Status Word according to FC Profile
(STW)
The status word is used to inform the master (for example,
a PC) of the operation mode of the slave (frequency
converter).
Refer to 8 Application Examples for an example of a status
word telegram using PPO type 3.
Bit
Bit=0
00
Control not ready
01
Frequency converter
not ready
5
5
02
Coasting
03
No error
04
No error
05
Reserved
06
No error
07
No warning
08
Speed reference
09
Local operation
10
Out of frequency limit
11
No operation
12
Frequency converter OK Stopped, autostart
13
Voltage OK
14
Torque OK
15
Timer OK
Table 5.8 Definition of Status Bits
Explanation of the status bits
Bit 00, Control not ready/ready
Bit 00="0" - the frequency converter has tripped.
Bit 00="1" - the frequency converter controls are ready, but
the power component is not necessarily receiving any
power supply (in case of external 24 V supply to controls).
Bit 01, frequency converter ready
Bit 01="0" - the frequency converter is not ready for
operation.
Bit 01="1" - the frequency converter is ready for operation,
but there is an active coasting command via the digital
inputs or via serial communication.
Bit 02, Coasting stop
Bit 02="0" - the frequency converter has released the
motor.
Bit 02="1" - the frequency converter can start the motor
when a start command is given.
Bit 03, No error/trip
Bit 03="0" - the frequency converter is not in fault mode.
18
MCA 123 POWERLINK Operating Instructions
Bit=1
Control ready
Frequency converter ready
Enable
Trip
Error (no trip)
-
Triplock
Warning
Speed=reference
Bus control
Frequency limit ok
In operation
Voltage exceeded
Torque exceeded
Timer exceeded
®
MG92C102 - VLT
is a registered Danfoss trademark
Bit 03="1" - the frequency converter is tripped, and that a
reset signal is required to re-establish operation.
Bit 04, No error/error (no trip)
Bit 04="0" - the frequency converter is not in fault mode.
Bit 04="1" - there is a frequency converter error but no
trip.
Bit 05, Not used
Bit 05 is not used in the status word.
Bit 06, No error/triplock
Bit 06="0" - the frequency converter is not in fault mode.
Bit 06="1" - the frequency converter is tripped, and locked.
Bit 07, No warning/warning
Bit 07="0" - there are no warnings.
Bit 07="1" - a warning has occurred.
Bit 08, Speed reference/speed = reference
Bit 08="0" - the motor is running, but that the present
speed is different from the preset speed reference. It could,
for example, be the case while the speed is being ramped
up/down during start/stop.
Bit 08="1" - the present motor present speed matches the
preset speed reference.
Bit 09, Local operation/bus control
Bit 09="0" - [Stop/Reset] is activated on the control unit, or
that Local control in 3-13 Reference Site is selected. It is not
possible to control the frequency converter via serial
communication.
Bit 09="1" - it is possible to control the frequency
converter via the fieldbus/serial communication.
Bit 10, Out of frequency limit
Bit 10="0" - the output frequency has reached the value in
4-11 Motor Speed Low Limit [RPM] or 4-13 Motor Speed High
Limit [RPM].
Bit 10="1" - the output frequency is within the defined
limits.
Bit 11, No operation/in operation
Bit 11="0" - the motor is not running.
Bit 11="1" - the frequency converter has a start signal or
the output frequency is greater than 0 Hz.
Bit 12, frequency converter OK/stopped, autostart
Bit 12="0" - there is no temporary over temperature on the
frequency converter.
Bit 12="1" - the frequency converter has stopped because
of over temperature, but the unit has not tripped and
resumes operation once the over temperature stops.
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