5- Drive Programming User Variables; Initial Data; U(00) To U(31) Or User Parameters; Ul(00) To Ul(07) Or Internal User Parameters - Omron MX2 Series User Manual

Drive Programming

5- Drive Programming user variables

5-1 Initial Data

U(00) to U(31) or User parameters

U(00) to
Description
U(31)
User variable
User variables are the general-purpose functions that can be used as unsigned 1-word. The data
written from a drive program to the user-defined variables is not stored in the inverter's EEPROM. The
variables will restore the initial settings when the inverter power is turned off. The user-defined
variables correspond to inverter parameters "P100" to "P131". You can also change the settings of
user-defined variables from the digital operator. The changes made from the digital operator will be
stored in EEPROM. This is also possible to emulate from drive programming by using the EepWrt
command.
The variables P129 to P131 (U(29) to U(31)) are saved at power down of the inverter automatically.
This function may not work under heavy load (motor output current) or too small inverter (low capacity
in DC bus). In case of trouble it is recommended to disable the inverter output to preserve the energy
in the capacitors.

UL(00) to UL(07) or Internal User parameters.

UL(00) –
Description
UL(07)
Internal user variable
Internal user variables are the general-purpose functions that can be used as unsigned 2-word
variables, for example, to temporarily store arithmetic operation results. The initial values can be set
via the initial program data.

5-2 Setting Variables

Set-Freq

Description
Output frequency
setting
When A001=7 (Freq. ref. from Drive Programming), it becomes the frequency set point of the inverter.
Always reflects the reading of parameter F001, regardless the setting of A001. This variable is not
stored in the inverter EEPROM. It will be restored to initial setting after power cycle.
When the inverter receives an operation command (FW=1 or RV=1), it accelerates the motor up to the
frequency that was set last.

ACCEL

Description
Acceleration time
setting
This variable can be used to read and write the motor acceleration time in the inverter. It is enabled
only when the setting of accel/decel time input selection (P031) is "03" (PRG). (Please note that it
does not correspond to the setting of inverter parameter "F002"). The data written to this variable is
not stored in the inverter's EEPROM. It restores initial value after power cycle.
Note 1: By default (when the inverter power is turned on), the acceleration time follows the
setting of the inverter parameter "F002", "F202", or "F302". For details, refer to the Inverter
Instruction Manual.
Note 2: When a program writes a value to this variable, the value is reflected in the inverter in
a 40-ms cycle, which conforms to the standard inverter specifications.
Range of values Default
0 to 65535
in P100
to P131
Range of values Default
− −
31 31
2 2 1
to
Range of values Default
0 to 40000
Range of values Default
1 to 360000 Note 1
25
Unit Data size
Data
stored Unsigned
-
1-word
Unit Data size
Signed
0 -
2-word
Unit Data size
0.01 Unsigned
0
Hz 1-word
Unit Data size
0.01 Unsigned
sec 2-word
Attribute
R/W
Attribute
R/W
Attribute
R/W
Attribute
R/W