5 Drive Programming User Variables
5 - 2
Drive Programming User’s Manual (I580-E2)
5-1 User Variables and User Parameters
The following variables are provided for creating programs: User parameter variables, internal user
variables, and internal user contacts.
Use these variables for the program user interface, initial data for calculation, data saving during calcu-
lation, data saving, etc.
The Drive Programming user parameter variables U(00) to U(31) are the unsigned 1-word variables.
The Drive Programming user parameters U00 to U31 (P100 to 131) for the inverter correspond to the
Drive Programming user parameter variables U(00) to U(31), respectively. Use these variables for the
following applications.
• The data of the parameters P100 to P131 saved in the EEPROM are automatically set to the user
parameter variables U(00) to U(31) when the power is turned on.
• By monitoring the parameters P100 to P131, you can check the data of the user parameter variables
U(00) to U(31) after the program execution is started. Note that the data displayed on the Digital
Operator is the data at the moment when it is displayed. To update the data, once display the param-
eter number and then display the data again.
• When you change the parameters P100 to P131 by the Digital Operator and press the Enter key, the
changed data is saved in the EEPROM and reflected in the current user parameter variables U(00) to
U(31). The data saved in the EEPROM is set to the variables U(00) to U(31) automatically when the
power supply is turned on again.
• Even if the data of the user parameter variables U(00) to U(31) is changed in the program, the changed
data is not saved in the EEPROM for the parameters P100 to P131.
• To save in the EEPROM the data set to the user parameter variables U(00) to U(31) in the program,
execute the “eepwrt” command and then the “ChgParam” command and specify the data you want to
save. The data is saved in the EEPROM area that is allocated to the parameters P100 to P131.
• Only for the user parameter variables U(29) to U(31), the data is saved automatically during power
interruptions. The data is saved in the EEPROM for the corresponding parameters P129 to P131. The
data of the user parameter variables U(00) to U(28) is not saved during the power interruption.
User Parameter Variables U(00) to U(31)
Application Description
User interface Use the variables as parameters to adjust calculation results. You can adjust
them using the inverter parameters (P100 to P131) according to the status of
application.
Initial data for calculation You can use the user parameter variables U(00) to U(31) as the variables for
calculation. The data of parameters P100 to P131 saved in the EEPROM
can be used as the initial data for calculation.
Data saving during calculation You can use the variables for saving data temporarily while the calculation is
in progress.
Data saving By using the “eepwrt” command, you can store the calculation result in the
EEPROM to save it after turning off the power supply.
With the parameters U(29) to U(31), the calculation result is stored in the
EEPROM automatically during power interruption of the inverter. The saved
data can be used as the initial data when the power supply is turned on
again.
Function
variable
Description Data range
Default
data
Unit Data size R/W
U(00) to
U(31)
User parameter variable
(corresponding to P100 to P131)
0 to 65,535 0 Unsigned
1 word
R/W
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