80 ACS 400 User’s Manual
Figure 27 Setting EXT REF MINIMUM and EXT REF MAXIMUM. The range of the analog input signal is
set by parameters 1301 and 1302 or parameters 1304 and 1305, depending on the analog input
used.
Continued from previous page
11= DI3U, 4D (R,NC)
Speed reference is given through digital inputs as motor potentiometer control. Digital input DI3 increases
the speed (the U stands for “up”), and digital input DI4 decreases the speed (the D stands for “down”). (R)
indicates that the reference will be reset to zero when a Stop command is given. (NC) indicates that the
reference is not copied when switching control locations, when switching back to a control location , the
reference returns to the last value used for that control location.
12= DI3U, 4D (NC)
Speed reference is given through digital inputs as motor potentiometer control. Digital input DI3 increases
the speed (the U stands for “up”), and digital input DI4 decreases the speed (the D stands for “down”). (NC)
indicates that the reference is not copied when switching control locations, when switching back to a control
location , the reference returns to the last value used for that control location.
12= DI3U, 5D (NC)
See description for 12. Digital input 5 decreases the speed.
1104 EXT REF1 MIN
Sets the minimum frequency reference for external reference 1 in Hz. When the analog input signal is at
minimum, external reference 1 is equal to
EXT REF1 MIN. See Figure 27 on page 80.
1105 EXT REF1 MAX
Sets the maximum frequency reference for external reference 1 in Hz. When the analog input signal is at
maximum, external reference 1 is equal to
EXT REF1 MAX. See Figure 27 on page 80.
1106 EXT REF2 SELECT
This parameter selects the signal source for external reference 2. The alternatives are the same as with
external reference 1, see 1103
EXT REF1 SELECT.
1107 EXT REF2 MIN
Sets the minimum reference in %. When the analog input signal is at minimum, external reference 2 is
equal to
EXT REF2 MIN. See Figure 27 on page 80.
• If the PID Control or PFC macro is selected, this parameter sets the minimum process reference.
• If any other macro than PID is selected, this parameter sets the minimum frequency reference. This
value is given as a percentage of the maximum frequency.
1108 EXT REF2 MAX
Sets the maximum reference in %. When the analog input signal is at maximum, external reference 2 is
equal to
EXT REF2 MAX. See Figure 27 on page 80.
• If the PID Control or PFC macro is selected, this parameter sets the maximum process reference.
• If any macro other than PID Control is selected, this parameter sets the maximum frequency reference.
This value is given as a percentage of the maximum frequency.
EXT
REF
Analog input signal
EXT
REF
MAX
EXT
REF
MIN
AI min
AI max
EXT
REF
Analog input signal
EXT
REF
MIN
EXT
REF
MAX
AI min AI max
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