9.2 Details of Function Codes
9-123
Chap. 9 FUNCTION CODES
y97 Communication Data Storage Selection
A nonvolatile storage in the inverter has a limited number of rewritable times (100,000 to
1,000,000 times). Saving data into the storage so many times unnecessarily will no longer
allow the storage to save data, causing memory errors.
For frequent data writing via the communications link, therefore, a temporary storage is
provided instead of the nonvolatile storage. To use the temporary storage, set the y97 data at
"1." Using the temporary storage reduces the number of data writing times into the
nonvolatile storage, preventing memory errors.
Setting the y97 data at "2" saves all data written in the temporary storage into the nonvolatile
one.
Changing the y97 data requires simultaneous keying of
and
/
keys.
Data for y97 Function
0 Save into nonvolatile storage (Rewritable times limited)
1 Write into temporary storage (Rewritable times unlimited)
2
Save all data from temporary storage to nonvolatile one
(After saving data, the data automatically returns to "1.")
y99 Loader Link Function (Mode selection)
This is a link switching function for FRENIC Loader. Rewriting the data of y99 to enable
RS-485 communications from Loader helps Loader send the inverter the frequency and/or
run commands. Since the data to be set in the function code of the inverter is automatically set
by Loader, no keypad operation is required.
When Loader is selected as the source of run commands, if the PC runs out of control and
cannot be stopped by a stop command sent from Loader, set the y99 data to "0" from the
keypad. The setting "0" in y99 means that the run and frequency command source specified
by H30 takes place instead of FRENIC Loader.
Note that the y99 data cannot be saved in the inverter. When the power is turned off, the y99
data is lost and reset to "0."
Function
Data for y99
Frequency command Run command
0 Follow H30 data Follow H30 data
1
Via RS-485 communications link
(FRENIC Loader, S01 and S05)
Follow H30 data
2 Follow H30 data
Via RS-485 communications link
(FRENIC Loader, S06)
3
Via RS-485 communications link
(FRENIC Loader, S01 and S05)
Via RS-485 communications link
(FRENIC Loader, S06)
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