Posted 19 May 2022 Hi guys. I found error on PLC and from PLC diagnostic I found this Operation Error 4100 as per attach picture. FYI, there is no SD card mount onto this PLC. I wonder what is ATA card. This error wont affect the operation. Any advise on what to check? This ladder is pop up when I clicked, error jump. Thanks. Share this post Link to post Share on other sites
Posted 19 May 2022 An ATA card is a type of CF card which could be used with the first series of Q series CPU's. Now SD cards are used. The error should only occur when File read or File write command is used. Isn't this instruction below the screencapture you send? 1 person likes this Share this post Link to post Share on other sites
Posted 19 May 2022 (edited) 53 minutes ago, Gambit said: An ATA card is a type of CF card which could be used with the first series of Q series CPU's. Now SD cards are used. The error should only occur when File read or File write command is used. Isn't this instruction below the screencapture you send? Hi Gambit, Thanks for you reply. What do you mean by File read/write? Is it the same as normal read/write like "MOV D1 D2" or is it read/write to/from ATA card? Sorry I am not familiar with this instruction. Btw, why there is error when read/write command is used? Thanks. Edited 19 May 2022 by d4rkm4n Share this post Link to post Share on other sites
Posted 19 May 2022 It's a command for reading values from a csv file from a CF flash ATA or SD card. You only get the error if there is no SD card. The instructions are FREAD & FWRITE (sp.fread sp.fwrite). But if these instructions are not used in the program it is strange you are getting this error. Share this post Link to post Share on other sites
Posted 27 May 2022 On 5/19/2022 at 4:24 PM, Gambit said: It's a command for reading values from a csv file from a CF flash ATA or SD card. You only get the error if there is no SD card. The instructions are FREAD & FWRITE (sp.fread sp.fwrite). But if these instructions are not used in the program it is strange you are getting this error. I believe there is no SD card attached. Any advise on what should I check? Some background, 1. There are around 7 PLC connected together through MelsecNET. 2. All PLC indicate this error. ERR LED lit up but not affecting sequence. 3. LED ERR will turn off after reset and come back on later, maybe after the instruction trigger. Share this post Link to post Share on other sites
