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Programmable Controllers MELSEC
FAQ within [ Programmable Controllers MELSEC ]
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Remedies for WDT errors on a MELSECNET/H board
The error code indicates a WDT (watchdog timer) error. It is determined as the cause that the MELSECNET/H driver cannot work due to a computer or OS hang, or... More Details >>
- No:22969
- Release Date:2018/09/03 17:31
- Category: Network related products
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This occurs when the specified memory does not have consecutive free space in it. In this case, delete unnecessary files or arrange the PLC memory. Select ... More Details >>
- No:22604
- Release Date:2018/09/03 17:29
- Update:2018/09/20 18:03
- Category: MELSEC-Q Series
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Checking the amount of free space of the memory in GX Developer/GX Works2
Select [Tool] -> [Confirm Memory Size] to check the amount. More Details >>
- No:22851
- Release Date:2018/09/03 17:30
- Category: Engineering Software
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Latch (backup) areas in the data register (D) and extended register (R) of the FX3U/FX3UC series
D200 to D7999 and R0 to R32767 can be latched. D200 to D511 can be set as non-latch areas in parameters. For details on the parameter setting, refer to the... More Details >>
- No:24699
- Release Date:2019/02/27 08:58
- Category: MELSEC-F Series , Engineering Software , Main Unit
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Keyword protection of the MELSEC-F series
The keyword protection cannot be forcibly reset. Since only the keyword that has been registered by theuser is acceptable, please take measures to ensure th... More Details >>
- No:24784
- Release Date:2019/02/27 16:27
- Category: MELSEC-F Series , Engineering Software , Main Unit
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How to install a battery to FX3G/FX3GC series
The FX3U-32BL can be installed to the FX3G/FX3GC series. After installation, select [Battery Mode: Use the battery] on the FX parameter window of GX Develop... More Details >>
- No:22271
- Release Date:2018/08/30 13:48
- Category: MELSEC-F Series , Main Unit , Accessories
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Regarding how to Monitor Buffer Memory Values
You can monitor buffer memory values in the Ladder Editor by setting in GX Works3 >Tools >Options > Monitor > Common Item > Monitor Buffer Mem... More Details >>
- No:39324
- Release Date:2023/01/12 16:56
- Category: MELSEC iQ-F Series , CPU Module
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When the message "An unusable COM port was specified" is displayed
RS-232 is selected as PC side I/F in Transfer Setup of GX Developer or GX Works2.Change the setting in PC side I/F to USB. More Details >>
- No:22517
- Release Date:2018/09/03 17:28
- Category: MELSEC-Q Series
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The error code "2200" is "MISSING PARA.". The causes of the error are described below. (1) The necessary parameter file does not exist in all drives. (2) ... More Details >>
- No:22749
- Release Date:2018/09/03 17:29
- Update:2018/09/22 09:12
- Category: MELSEC-L Series
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Regarding how to format an SD memory card
In GX Works3, go to Online > CPU Memory Operation, select "SD Memory Card" and execute "Initialization." More Details >>
- No:39344
- Release Date:2023/02/15 10:03
- Category: MELSEC iQ-F Series , Option , CPU Module , Engineering Software
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