Input Terminal Functions
6-55
Raising and Lowering Frequency References Using Contact Signals
(UP/DOWN)
The UP and DOWN commands raise and lower Inverter frequency references by turning ON and OFF a
multi-function contact input terminal S3 to S7.
To use this function, set two of the constants H1-01 to H1-05 (multi-function contact input terminal S3 to S7
function selection) to 10 (UP command) and 11 (DOWN command). Be sure to allocate two terminals so that
the UP and DOWN commands are used as a pair. Otherwise an OPE03 alarm will be displayed.
The table below shows the possible combinations of the UP and DOWN command and the corresponding
operation.
The change of the output frequency depends on the acceleration and deceleration times. Be sure to set b1-02
(Run command selection) to 1 (Control circuit terminal).
Related Constants
Precautions
Setting Precautions
If multi-function input terminals S3 to S7 are set as follows, operation error OPE03 (Invalid multi-function
input selection) will occur:
• Only either the UP command or DOWN command has been set.
• UP/DOWN commands and Acceleration/Deceleration Ramp Hold have been allocated at the same time.
Operation Acceleration Deceleration
Hold Hold
Up command ON OFF ON OFF
Down command OFF ON ON OFF
Con-
stant
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Access
Level
d2-01 Frequency reference upper limit
Sets the frequency reference upper limit as a percent, tak-
ing the maximum output frequency to be 100%.
0.0 to
110.0
100.0% No A
d2-02 Frequency reference lower limit
Sets the frequency reference lower limit as a percentage of
the maximum output frequency.
0.0 to
110.0
0.0% No A
d2-03
Master speed reference lower
limit
Sets the master speed frequency reference lower limit as a
percent, taking the maximum output frequency to be
100%.
0.0 to
110.0
0.0% No A
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