ABB ACS140 - Page 60

51
Figure 3 Setting
EXT REF MINIMUM and EXT REF MAXIMUM. The range of the
analogue input signal is set by parameters 1301 and 1302 or parameters
1304 and 1305, depending on the analogue input used.
1105 EXT REF1 MAX
Sets the maximum frequency reference for external reference 1 in Hz. When
analogue input signal is at maximum, external reference 1 equals to
EXT REF1
MAX. See Figure 3.
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 parameter 1103
EXT
REF1 SELECT.
1107 EXT REF2 MIN
Sets the minimum reference in %. When analogue input signal is at minimum
value external reference 2 equals to
EXT REF2 MIN. See Figure 3.
• If the PID Control 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 analogue input signal is at maximum,
external reference 2 equals to
EXT REF2 MAX. See Figure 3.
• If the PID Control macro is selected, this parameter sets the maximum
process reference.
• If any other macro than PID Control is selected, this parameter sets the
maximum frequency reference. This value is given as percentage of
maximum frequency.
EXT REF
Analogue
EXT REF
EXT REF
AI min
AI max
input signal
MIN
MAX
EXT REF
Analogue
EXT REF
EXT REF
AI min AI max
input signal
MAX
MIN
www.barghmaher.org
ac.maher.co.ir