ABB ACS255 - Page 43

44
Parameters in the Long parameter mode
Index
Name/Selection
Description
Def
12
CONSTANT SPEEDS
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.
1202
PRESET / JOG FREQUENCY
/ SPEED 1
Defines constant speed 1 (that is the drive output frequency)
5.0Hz/RPM
2007…-2008
Output Frequency
1203
PRESET / JOG FREQUENCY
/ SPEED 2
Defines constant speed 2 (that is the drive output frequency)
10.0Hz/RPM
2007…-2008
Output Frequency
1204
PRESET / JOG FREQUENCY
/ SPEED 3
Defines constant speed 3 (that is the drive output frequency)
25.0Hz/RPM
2007…-2008
Output Frequency
1205
PRESET / JOG FREQUENCY
/ SPEED 4
Defines constant speed 4 (that is the drive output frequency)
60.0Hz/RPM
2007…-2008
Output Frequency
13
ANALOG INPUTS
Analog input signal processing
1300
ANALOG INPUT 1
(TERMINAL 6) FORMAT
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  if the signal level falls
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  if the signal level falls
below 3mA

20 to 4mA Signal, the ACS255 will ramp to stop if the signal level falls below 3mA
1301
ANALOG INPUT 1 OFFSET
Sets an offset, as a percentage of the full scale range of the input, which is applied to the
analog input signal
0.0%
-500…500 %
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%
1302
ANALOG INPUT 1 SCALING
Scales the analog input by this factor, (as a percentage of the full scale range of this input).
100.0%
0.0…2000.0 %
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
1304
ANALOG INPUT 2
(TERMINAL 10) FORMAT
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  if the signal level falls
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  if the signal level falls
below 3mA