DeviceNet Slave Communication Module IFD9502 „ Format of messages responded „ If error occurs during the communication, IFD9502 will send the error code to the master. See the table below for the definitions of error codes. 4. I/O data mapping (default) z PLC → DeviceNet master z DeviceNet master → PLC z Explanation „ When the equipment connected to IFD9502 is PLC, the length of data downloaded from IFD9502 to PLC is preset as 7 words at addresses D500 ~ D505 and M512 ~ M521. IFD9502 is able to download maximum 128 words to the word device D, T, and C and 256 bits to bit devices M, Y, and S in PLC, but the total data length downloaded to M and D should be no more than 256 bytes.
The length of data uploaded from the PLC to IFD9502 is preset as 7 words at addresses D408 ~ D413 and M256 ~ M265. IFD9502 is able to be uploaded maximum 128 words from the word device D, T, and C and 256 bits to bit devices M, Y, and S in PLC but the total data length uploaded from M and D should be no more than 256 bytes. „ The length of I/O data to be exchanged and address for mapping can be modified through changing Class 0x97 as listed below. The modification will be valid after IFD9502 is re-powered. Maximum 16 words are allowed for I/O data exchange. „ If you are to return the I/O mapping to default setting, change Attribute1 of Instance1 of Class 0x97 into H0001 and re-power IFD9502.
Please note that doing so can only recover DVP-PLC Application Manual 12 Byte position Data read from PLC Data written into PLC 0 Frag [0]+XID+MAC ID Frag [0]+XID+MAC ID 1 R/R [1]+Service code [0x32] R/R [1]+Service code [0x33] 2 ~ 7 Response data N/A Error code Definition Byte 1 Byte 2 0x08 0xFF Service not supported (Invalid service code) 0x16 0xFF Object polled does not exist (Illegal instance ID or class ID) 0x20 0x01 Communication instruction is illegal 0x20 0x02 The register address is illegal 0x20 0x03 The register No. in PLC exceeds the range 0x20 0x04 Cannot respond to the inquiry 0x20 0x07 IFD9502 and PLC communication error Start address of Default length of Max.
Length of Project Unit Description I/O data mapping I/O data mapping I/O data mapping PLC→DeviceNet D408 (H’1198) 6 128 word (M/8)+(D*2) M256 (H’0900) 10 256 bit Start address of Default length of Max. Length of Project Unit Description I/O data mapping I/O data mapping I/O data mapping DeviceNet→PLC D500 (H’11F4) 6 128 word (M/8)+(D*2) M512 (H’0A00) 10 256 bit