ABB ACS255 User Manual page 43

44
Parameters in the Long parameter mode
Index Name/Selection
12 CONSTANT SPEEDS
1202 PRESET / JOG FREQUENCY
/ SPEED 1
2007...-2008
1203 PRESET / JOG FREQUENCY
/ SPEED 2
2007...-2008
1204 PRESET / JOG FREQUENCY
/ SPEED 3
2007...-2008
1205 PRESET / JOG FREQUENCY
/ SPEED 4
2007...-2008
13 ANALOG INPUTS
1300 ANALOG INPUT 1
(TERMINAL 6) FORMAT
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



 

1301 ANALOG INPUT 1 OFFSET
-500...500 %
1302 ANALOG INPUT 1 SCALING
0.0...2000.0 %
1304 ANALOG INPUT 2
(TERMINAL 10) FORMAT
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




 
Description
Constant speed selection and values.
It is possible to have four constant speeds (positive or negative values).
Constant speeds. Constant speed activation overrides the external speed reference. Constant
speed selections are ignored if the drive is in the local control mode.
Refer to section 8.1 for how to make constant speed selections from the drive control
terminals.
Preset Speeds / Frequencies selected by digital inputs depending on the setting of Parameter
9902.
If Parameter 9908 = 0, the values are entered as Hz. If Parameter 9908 > 0, the values are
entered as Rpm.
Setting a negative value will reverse the direction of motor rotation.
Defines constant speed 1 (that is the drive output frequency)
Output Frequency
Defines constant speed 2 (that is the drive output frequency)
Output Frequency
Defines constant speed 3 (that is the drive output frequency)
Output Frequency
Defines constant speed 4 (that is the drive output frequency)
Output Frequency
Analog input signal processing
Selects the type of reference source into terminal 6.
0 to 10 Volt Signal (Uni-polar)
10 to 0 Volt Signal (Uni-polar)
-10 to +10 Volt Signal (Bi-polar)
0 to 20mA Signal
4 to 20mA Signal, the ACS255 will trip and show the fault code
below 3mA
4 to 20mA Signal, the ACS255 will ramp to stop if the signal level falls below 3 mA
20 to 4mA Signal, the ACS255 will trip and show the fault code
below 3mA
20 to 4mA Signal, the ACS255 will ramp to stop if the signal level falls below 3mA
Sets an offset, as a percentage of the full scale range of the input, which is applied to the
analog input signal
Value in percent of the full scale range of the input
Example: If the analog input signal format is 0-10V, offset = 20% .
An analog input signal level of 7 Volts gives the following result :-
Analog input level (%) = 7/10 = 70%
Result = 70-20 (%) = 50%
Scales the analog input by this factor, (as a percentage of the full scale range of this input).
Example: If parameter 1300 ANALOG INPUT 1 FORMAT is set for 0 – 10V, and the scaling
factor is set to 200.0%, a 5 volt input will result in the drive running at maximum speed as set
in parameter 2008 MAX SPEED LIMIT
Selects the type of reference source into terminal 10.
0 to 10 Volt Signal (Uni-polar)
10 to 0 Volt Signal (Uni-polar)
Motor PTC Thermistor Input
0 to 20mA Signal
4 to 20mA Signal, the ACS255 will trip and show the fault code
below 3mA
4 to 20mA Signal, the ACS255 will ramp to stop if the signal level falls below 3 mA
20 to 4mA Signal, the ACS255 will trip and show the fault code
below 3mA

if the signal level falls

if the signal level falls

if the signal level falls

if the signal level falls
Def
5.0Hz/RPM
10.0Hz/RPM
25.0Hz/RPM
60.0Hz/RPM
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0.0%
100.0%
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