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User Area Read/Write Method
4
PLC FUNCTION
4.9 User Area Read/Write Method
Inverter parameters Pr. 510 to Pr. 529 can be used as user parameters.
Since this parameter area and the devices used with the PLC function, D100 to D119,
are accessible to each other, the values set in Pr. 510 to Pr. 529 can be used in a
sequence program. The result of operation performed in the sequence program can
also be monitored using Pr. 510 to Pr. 529.
4.9.1 User parameter read/write method
User parameter (Pr. 510 to Pr. 529) and device (D100 to D119) data can be read/
written freely. Data transfer between Pr. 510 to Pr. 529 and D100 to D119 is executed
automatically.
1)User parameter write processing
When values are written to Pr. 510 to P. 529 using the FR-PU04 or computer link
communication, they are written to the parameter storing RAM area and E
2
PROM
area, and further to D100 to D119 simultaneously.
2)User parameter read processing
When values are written to D100 to D119 from the PLC function side, they are
written to the parameter storing RAM area (Pr. 510 to P. 529) and read using the
FR-PU04 or computer link communication. (Since data are not written to the
E
2
PROM, making power-on reset returns the data to the original values.)
3)Processing performed at inverter reset or power restoration
When the inverter is reset, the Pr. 510 to Pr. 529 values stored in the E
2
PROM are
transferred to the RAM area and D100 to D119.
Device
No.
Inverter
Parameter
No.
Name
Factory
Setting
Setting
Range
Minimum Setting
Unit
Data Access
D100 to
D119
510 to 529
User
parameters
0
0 to
65535
1
Always
enabled
POINT
Example of using the user parameter area
When the timing is to be changed for machine adjustment using D100 that
stores the timer setting, setting Pr. 510 without modifying the program enters
the set data into D100, enabling adjustment.
Pr.510 to Pr.529
D100 to D119
Inverter parameters
PLC function devices
Pr.510 to Pr.529
(RAM)
D100 to D119
Pr.510 to Pr.529
(E
2
PROM)
3)
3)
1)
1)
2)
2)
1)
1)
FR-PU04 or RS-485
communication