esp-modbus/docs/_static/modbus_frame_examples.diag

# Modbus frame packaging examples

blockdiag mb_master_frames {
        # global properties
        span_width = 5;
        span_height = 5;
        node_height = 25;
        default_group_color = lightgrey;
        default_fontsize = 15;
        # tuning node properties and connections
        group 16bit_packets {
            label = "16bit frame";
            color = red;
            shape = line;
            style = dashed;
            16bit_notes;
        }
        group 32bit_packets {
            label = "32bit frame";
            color = green;
            shape = line;
            style = dashed;
            group{32bit_notes};
        }
        group 64bit_packets {
            label = "64bit frame";
            color = blue;
            shape = line;
            style = dashed;
            64bit_notes;
        }
        16bit_notes[label="UINT16, INT16 VALUE = 0x3039 = (uint16_t)12345", width=600, color=orange, shape = roundedbox];
        req_u16_hd1[label= "TX:| UID | FC | REG_START | REG_LEN | CRC   |", color=lightyellow, width=380, colwidth=2, shape = roundedbox ,group=16bit_packets];
        req_u16_frm1[label="TX:| 01  | 03 | 00 04 | 00 02 | 85 CA |", color=lightgrey, width=380, colwidth=2,group=16bit_packets];
        rsp_u16_hd1[label= "RX:| UID | FC | LEN | UINT16_AB1 | UINT16_AB2 | CRC   |", color=lightyellow, width=380, colwidth=2, shape = roundedbox ,group=16bit_packets];
        rsp_u16_frm1[label="RX:| 01  | 03 | 04 | 30 39 | 30 39 | F1 2C |", color=lightgrey, width=380, colwidth=2,group=16bit_packets];
        rsp_u16_hd2[label= "RX:| UID | FC | LEN | UINT16_BA1 | UINT16_BA2 | CRC   |\n ", color=lightyellow, width=380, colwidth=2, shape = roundedbox, group=16bit_packets];
        rsp_u16_frm2[label="RX:| 01  | 03 | 04 | 39 30 | 39 30 | E4 E4 |\n", color=lightgrey, width=380, colwidth=2,group=16bit_packets];
        32bit_notes[label="(UINT32, INT32) FLOAT32 VALUE = 0x4640e400 = 12345.0", width=600, color=lightgreen, shape = roundedbox];
        req_fl_hd1[label= "TX:| UID | FC | REG_START | REG_LEN | CRC   |", color=lightyellow, width=380, colwidth=2, shape = roundedbox ,group=32bit_packets];
        req_fl_frm1[label="TX:| 01  | 03 | 00 XX | 00 04 | C5 CB |", color=lightgrey, width=380, colwidth=2,group=32bit_packets];
        rsp_fl_hd1[label= "RX:| UID | FC | LEN | FLOAT_ABCD1 | FLOAT_ABCD2 | CRC   |", color=lightyellow, width=380, colwidth=2, shape = roundedbox ,group=32bit_packets];
        rsp_fl_frm1[label="RX:| 01  | 03 | 08 | E4 00 46 40 | E4 00 46 40 | 90 65 |", color=lightgrey, width=380, colwidth=2,group=32bit_packets];
        rsp_fl_hd2[label= "RX:| UID | FC | LEN | FLOAT_CDAB1 | FLOAT_CDAB2 | CRC   |\n ", color=lightyellow, width=380, colwidth=2, shape = roundedbox, group=32bit_packets];
        rsp_fl_frm2[label="RX:| 01  | 03 | 08 | 46 40 E4 00 | 46 40 E4 00 | 18 71 |\n", color=lightgrey, width=380, colwidth=2,group=32bit_packets];
        rsp_fl_hd3[label= "RX:| UID | FC | LEN | FLOAT_BADC1 | FLOAT_BADC2 | CRC   |\n ", color=lightyellow, width=380, colwidth=2, shape = roundedbox, group=32bit_packets];
        rsp_fl_frm3[label="RX:| 01  | 03 | 08 | 00 E4 40 46 | 00 E4 40 46 | 46 D3 |\n", color=lightgrey, width=380, colwidth=2,group=32bit_packets];
        rsp_fl_hd4[label= "RX:| UID | FC | LEN | FLOAT_DCAB1 | FLOAT_DCAB2 | CRC   |\n ", color=lightyellow, width=380, colwidth=2, shape = roundedbox, group=32bit_packets];
        rsp_fl_frm4[label="RX:| 01  | 03 | 08 | 40 46 00 E4 | 40 46 00 E4 | 32 6B |\n", color=lightgrey, width=380, colwidth=2,group=32bit_packets];
        64bit_notes[label="(UINT64, INT64) FLOAT64 VALUE = 0x40c81c8000000000 = 12345.0", width=600, color=lightblue, shape = roundedbox];
        req_dbl_hd1[label= "TX:| UID | FC | REG_START | REG_LEN | CRC   |", color=lightyellow, width=380, colwidth=2, shape = roundedbox ,group=64bit_packets];
        req_dbl_frm1[label="TX:| 01  | 03 | 00 28 | 00 08 | C4 04 |", color=lightgrey, width=380, colwidth=2,group=64bit_packets];
        rsp_dbl_hd1[label= "RX:| UID | FC | LEN | DOUBLE_ABCDEFGH1 | DOUBLE_ABCDEFGH2 | CRC   |", color=lightyellow, width=380, colwidth=2, shape = roundedbox ,group=64bit_packets];
        rsp_dbl_frm1[label="RX:| 01  | 03 | 10 | 00 00 00 00 1C 80 40 C8 | 00 00 00 00 1C 80 40 C8 | 9F 4B |", color=lightgrey, width=380, colwidth=2,group=64bit_packets];
        rsp_dbl_hd2[label= "RX:| UID | FC | LEN | DOUBLE_HGFEDCBA1 | DOUBLE_HGFEDCBA2 | CRC   |\n ", color=lightyellow, width=380, colwidth=2, shape = roundedbox, group=64bit_packets];
        rsp_dbl_frm2[label="RX:| 01  | 03 | 10 | C8 40 80 1C 00 00 00 00 | C8 40 80 1C 00 00 00 00 | DF D3 |\n", color=lightgrey, width=380, colwidth=2,group=64bit_packets];
        rsp_dbl_hd3[label= "RX:| UID | FC | LEN | DOUBLE_GHEFCDAB1 | DOUBLE_GHEFCDAB2 | CRC   |\n ", color=lightyellow, width=380, colwidth=2, shape = roundedbox, group=64bit_packets];
        rsp_dbl_frm3[label="RX:| 01  | 03 | 10 | 40 C8 1C 80 00 00 00 00 | 40 C8 1C 80 00 00 00 00 | B1 9C |\n", color=lightgrey, width=380, colwidth=2,group=64bit_packets];
        rsp_dbl_hd4[label= "RX:| UID | FC | LEN | DOUBLE_BADCFEHG1 | DOUBLE_BADCFEHG2 | CRC   |\n ", color=lightyellow, width=380, colwidth=2, shape = roundedbox, group=64bit_packets];
        rsp_dbl_frm4[label="RX:| 01  | 03 | 10 | 00 00 00 00 80 1C C8 40 | 00 00 00 00 80 1C C8 40 | 86 94 |\n", color=lightgrey, width=380, colwidth=2,group=64bit_packets];
}