Appendix B Explanation of Ethernet parameters setting: Modbus TCP Communication: 1. Modbus TCP message structure: 2. Modbus function code DVP10MC11T supports: DVP-MC operating manual B-3 name Equipment name which users could name by themselves. IP Address The IP address of DVP10MC11T IP Configuration There are Static and DHCP selections for DVP10MC11T Ethernet. If DHCP (dynamic) is selected, the Ethernet parameters are obtained by DVP10MC11T itself; if Static is selected, the parameters will be set by user.
Netmask Subnet mask of DVP10MC11T Getway Gateway address of DVP10MC11T Data order Name Explanation Byte0 Transaction identifier High byte 0 Byte1 Low byte Byte2 Protocol identifier High byte 0 Byte3 Low byte Byte4 Modbus data length High byte The number of bytes for Modbus address and the data after it Byte5 Low byte Byte6 Modbus ID Single byte 0～0xFF Byte7 Function code Single byte Byte8 Device address in DVP10MC11T High byte 0~0xFFFF Byte9 Low byte Byte10 Modbus data High byte The byte number of Modbus data is determined by function code. Byte11 Low byte Function code Function Device 0x02 Read bit-device register value; maximum 256 bits of data could be read once.
M,I,Q 0x03 Read one single or multi word-device register value; maximum 64 words of data could be read once. D 0x05 Write one single bit-device register value. M ,Q 0x06 Write one single word-device register value D 0x0F Write multi bit-device register value; maximum 256 bits of data could be written once. M,Q 0x10 Write multi word-device register value; maximum 64 words of data could be written. D