Chapter 6 – Parameters
6-6
ACH 500 Programming Manual
4 EXT REF1 MAXIMUM
0 Hz – 500 Hz (ACH 501)
0 Hz – 120 Hz (ACH 502)
This parameter sets the frequency corresponding to the maximum reference.
When Parameter 20.1.2 (Maximum Frequency) is changed, this parameter is
automatically set to the same value.
5 EXT REF1 OFFSET
This parameter with the EXT REF1 GAIN are used for scaling the incoming
serial reference. The EXT REF1 OFFSET is added to the received serial
reference.
6 EXT REF1 GAIN
This parameter with the EXT REF1 OFFSET are used for scaling the
incoming serial reference. The EXT REF1 GAIN specifies what percentage of
the received serial reference is added to the received serial reference.
The External Reference Offset and Gain are used to scale also the reference
sources
AI1
,
AI2
, and
AI1/JOYST
.
Example: The reference is 20 Hz, EXT REF1 OFFSET is 5Hz, and EXT
REF1 GAIN is 10%. The drive reference is now 20Hz + 5Hz + 0.1* 20Hz =
27Hz.
7 EXTERNAL REF2 SEL
OP DATA 14
This parameter selects the signal source for External Reference 2.
Reference is given from the Keypad, Operating Data Parameter 14.
AI1
Reference from analog input 1.
AI2
Reference from analog input 2
DI3U,4D(R)
Speed reference via digital inputs as Floating Point Control, or Motor
Operated Potentiometer Control. DI3 increases speed, and DI4 decreases
speed. (R) indicates that the reference will reset to zero when stop command
is given.
DI3U,4D
Same as above except speed reference does not reset to zero on stop
command.
DI5U,6D
Same as above.
8 EXT REF2 MINIMUM
0 Hz – 500 Hz (ACH 501)
0 Hz – 120 Hz (ACH 502)
This parameter sets the frequency corresponding to the minimum reference.
When Parameter 20.1.1 (Minimum Frequency) is changed, this parameter is
automatically set to the same value.
