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Inverter Parameter Read/Write Method
4
PLC FUNCTION
4.8 Inverter Parameter Read/Write Method
The inverter parameters can be accessed from the sequence program. X28 to X2B/
Y28 to Y2B are used to perform read/write between the predetermined data registers
(D50 to D93) to read/write parameter values.
Refer to pages 110 and 111 for the accessible parameters and the data registers used
for parameter read/write. (The other parameters are not accessible from the PLC
function. Use the FR-PU04 (option) to access such parameters.)
When parameter read/write processing from the sequence program is not performed,
data registers D50 to D93 can be used freely by the user as general-purpose data
registers.
However, when parameter read/write processing from the sequence program is
performed, D50 to D93 are updated by Y28 to Y2B and their data are overwritten.
Therefore, note this point when using them on the user side.
Actual read/write processing is performed at the END processing of the sequence.
Refer to page 184 for the parameter setting units.
Device
No.
Name
Description
Data Access Enable
Condition
(Operation mode)
Command Completion
D50 to
D93
Inverter
parameter
read/write
Read
E
2
PROM
Y28 X28
Always
RAM Y29 X29
Write
E
2
PROM
Y2A X2A
PU, CC-Link
operation mode
(as in Pr. 77)
RAM Y2B X2D
POINT
The inverter must be in the PU or CC-Link operation mode to write the inverter
parameters. (Refer to page 76.)