Mitsubishi Electric MELSEC FX3U Programming Manual page 764

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Errors
An operation error is caused in the following cases; The error flag M8067 turns ON, and the error code is
stored in D8067.
• When any device number other than the head device number of a sector of extension file registers is set to
(error code: K6706)
S
• When a memory cassette is not connected (error code: K6771)
• When the protect switch of the memory cassette is set to ON (error code: K6770)
• When the collation result after data writing is "mismatch" due to omission of initialization or for another
reason (error code: K6770)
When this error occurs, the current values (data) of extension registers (R) may be lost. To avoid the data
loss, back up the data of extension registers (R) in advance using the following procedure:
1)Set the PLC mode to STOP.
2)Create a new project in GX Developer.
This step is not necessary if it is alright to overwrite the current project.
3)Read the contents of extension registers (R) to GX Developer.
[1]Select "Online" → "Read from PLC..." to
display the "Read from PLC" window.
[2]Click "PLC parameter" and "Device data"
to put a check mark to each of them.
[3]Click [Execute] button to execute reading.
[4]When reading is completed, save the
project.
4)Change the current program inside the PLC to
the program shown in "1. Cautions on writing
data to a memory cassette" in "Cautions" on
the previous page.
5)To the PLC, write the data which was temporarily withdrawn to GX Developer.
[1]Select "Online" → "Write to PLC..." to
display the "Write to PLC" window.
[2]Click "PLC parameter" and "MAIN" to put
a check mark to each of them.
[3]Click [Execute] button to execute writing.
6)Change the PLC mode from STOP to RUN, execute the program, and store the data to extension file
registers inside the memory cassette.
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33 Extension File Register Control – FNC290 to FNC299
33.2 FNC291 – SAVER / Save to ER
*1.For Ver. 8.13P to 8.24A of GX Developer, the PLC
type is FX .
3UC
*2.For Ver. 8.13P to 8.24A of GX Developer, the PLC
type is FX .
3UC
FX3U(C)*1
FX3U(C)*2