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How to Control the Frequenc...
NOTE
In 8-50 Coasting Select a selection is made to define how
Bit 03 gates with the corresponding function on a digital
input.
Bit 04, Quick stop
Bit 04="0" - causes a quick stop, ramping the motor speed
down to stop via 3-81 Quick Stop Ramp Time.
Bit 04="1" - the frequency converter ramps the motor
speed down to stop via 3-81 Quick Stop Ramp Time.
Bit 05, Hold output frequency
Bit 05="0" - causes the present output frequency (in Hz) to
freeze. The frozen output frequency can only be changed
with the digital inputs (5-10 Terminal 18 Digital Input to
5-15 Terminal 33 Digital Input) programmed to Speed up
and Speed down.
Bit 05="1" - use ramp.
NOTE
If Freeze output is active, stop the frequency converter with
•
Bit 03 Coasting stop
•
Bit 02 DC braking
•
Digital input (5-10 Terminal 18 Digital Input to
5-15 Terminal 33 Digital Input) programmed to DC
braking, Coasting stop, or Reset and coasting stop.
Bit 06, Ramp stop/start
Bit 06="0" - causes a stop, in which the motor speed is
ramped down to stop via the selected ramp down
parameter.
Bit 06="1" - permits the frequency converter to start the
motor, if the other starting conditions have been fulfilled.
NOTE
In 8-53 Start Select a selection is made to define how Bit 06
Ramp stop/start gates with the corresponding function on
a digital input.
Bit 07, Reset
Bit 07="0" - does not cause a reset.
Bit 07="1" - causes the reset of a trip. Reset is activated on
the signals leading edge, that is, when changing from logic
"0" to logic "1".
Bit 08, Jog
Bit 08="0" - no function.
Bit 08="1" - 3-19 Jog Speed [RPM] determines the output
frequency.
Bit 09, Selection of ramp 1/2
Bit 09="0" - ramp 1 is active (3-40 Ramp 1 Type to
3-47 Ramp 1 S-ramp Ratio at Decel. Start).
MCA 123 POWERLINK Operating Instructions
Bit 09="1" - ramp 2 (3-50 Ramp 2 Type to 3-57 Ramp 2 S-
ramp Ratio at Decel. Start) is active.
Bit 10, Data not valid/Data valid
Is used to tell the frequency converter whether it should
use or ignore the control word.
Bit 10="0" - the control word is ignored.
Bit 10="1" - the control word is used. This function is
relevant, because the control word is always contained in
the telegram, regardless of which type of telegram is used.
Thus, it is possible to turn off the control word, if it is not
wished to use it when updating or reading parameters.
Bit 11, Relay 01
Bit 11="0" - relay 01 not activated.
Bit 11="1" - relay 01 activated, provided Control word bit
11 has been chosen in 5-40 Function Relay.
Bit 12, Relay 04
Bit 12="0" - relay 04 has not been activated.
Bit 12="1" - relay 04 has been activated, provided Control
word bit 12 has been chosen in 5-40 Function Relay.
Bit 13/14, Selection of set-up
Bits 13 and 14 are used to choose from the four menu set-
ups according to Table 5.7:
The function is only possible when Multi-Set-ups is selected
in 0-10 Active Set-up.
Table 5.7 Selection of Set-up
NOTE
In 8-55 Set-up Select a selection is made to define how Bit
13/14 gates with the corresponding function on the digital
inputs.
Bit 15 Reverse
Bit 15="0" - no reversing.
Bit 15="1" - reversing.
®
MG92C102 - VLT
is a registered Danfoss trademark
Set-up
Bit 14
1
0
2
0
3
1
4
1
5
5
Bit 13
0
1
0
1
17
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