Mitsubishi Electric MELSEC FX3U Programming Manual page 776

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
• While data is written, the remaining area and the data quantity to be written are compared with each other.
If the remaining storage area is insufficient, only a limited amount of data is written. (error code: K6706)
• 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 "Read from PLC" window.
[2]Click "Parameter" and "Device data" to
put a check mark next to each of them.
[3]Click [Execute] button to execute reading.
[4]When reading is completed, save the
project.
774
33 Extension File Register Control – FNC290 to FNC299
33.4 FNC293 – LOGR / Logging R and ER
*1.For Ver. 8.13P to 8.24A of GX Developer, the PLC
type is FX .
3UC
FX3U(C)*1