5-179
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.")
y98
Bus Link Function (Mode selection)
(Refer to H30.)
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.
With Loader being selected as a run command source, if the computer runs out of control and cannot be stopped by a stop
command sent from Loader, disconnect the RS-485 communications cable from the port 1 (or disconnect the USB cable in
the case of a remote keypad equipped with a USB port), connect a keypad instead, and reset the y99 data to "0." The setting
of "0" in y99 means that the run and frequency command source specified by function code H30 takes place instead of
FRENIC Loader.
Note that the inverter cannot save the setting of y99. When power is turned off, the data in y99 is lost (y99 is reset to "0").
Data for y99
Function
Frequency command
Run command
0
Follow H30 and y98 data
Follow H30 and y98 data
1
Via RS-485 link (FRENIC Loader)
Follow H30 and y98 data
2
Follow H30 and y98 data
Via RS-485 link (FRENIC Loader)
3
Via RS-485 link (FRENIC Loader)
Via RS-485 link (FRENIC Loader)
Summary of Contents for FRENIC-MEGA
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