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brindha · Junior Joined: 17 Oct 2017 Posts: 1

I am Unable to read & write Long Counter (64-Bit) operand in Mitsubishi IQF PLC(FX5U-32M Series) using Ethernet.
All other operands are working fine apart from LC.

This is my 3E Telegram Request structure for iQF PLC.

typedef struct
{
SR_UINT16 SubHeader; ///< 2 bytes - Specify Request (5000H) / Response (D000H)
SR_UINT8 NetworkNo; ///< 1 byte - Network number (always 0 - no routing)
SR_UINT8 PCNumber; ///< 1 byte - PC number (0xFF local , no routing)
SR_UINT16 ModuleIO; ///< 2 bytes - Destination IO number : always 0x3FF
SR_UINT8 StationNo; ///< 1 byte - Requested Station number : always 0
SR_UINT16 TelegramLen; ///< 2 bytes - Length of the telegram
SR_UINT16 Reserved; ///< 2 bytes - Reserved for future use.
SR_UINT16 Command; ///< 2 bytes - Command - Specify Read / Write operation
SR_UINT16 SubCommand; ///< 2 bytes - Sub command - Speciry Bit / Batch operation
SR_UINT8 DataAddress[3]; ///< 3 bytes - The starting address of PLC to read / write
SR_UINT8 DataTypeCode; ///< 1 byte - File types code - X, Y, M, B, F, W, T, C, D
SR_UINT16 ReqUnitLength; ///< 2 Byte - Number of units requested
SR_UINT8 Data[DATA_LEN]; ///< N Bytes - Data to send
}TelegramReq;

I have compared the telegram structure for 'W' operand and LC. W is working fine and can see the only difference between them are address and device code. Attached the snapshot of the same.
Also, I did necessary modification in PLC side to configure LC operand using GX work3.

PLC is responding with error code C05C.

C05C Error code description: The request data is incorrect. (e.g. reading or writing data in units of bits from or to a word device.
Correct the request data and resend it to the CPU module. (e.g. subcommand correction)

Please help me, in case I am missing something in telegram request structure.

[url=http://www.99poze.ro/p/09d7e1fd915451bd950dc5203c6d628d.jpg] Unable to read&write LC operand in Mitsubishi IQF PLC Unable to read&write LC operand in Mitsubishi IQF PLC

Unable to read&write LC operand in Mitsubishi IQF PLC Unable to read&write LC operand in Mitsubishi IQF PLC

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vyr · Junior Joined: 06 Jun 2018 Posts: 1

This library contains FBs providing Ethernet Socket communication (TCP/IP & UDP/IP), as well as SLMP Protocol and MC Protocol (A compatible 1E frames) communication for the MELSEC FX5U CPU built-in Ethernet port.
https://www.datafilehost.com/d/ad0734cd