Multitek Comm-Box Spezifikationen PDF herunterladen (Seite 39)

A sample write packet will look like this:-

[Node][04][start address][No. of Double Registers

Requested][CRC(2 bytes)]

e.g. To read line to neutral voltages on node 23h:-

[23h][04h][0006h][0006h(3, 4 byte regs)] [CRC(2 bytes)]

The node’s return packet will look like:-

[23h][04h][000Ch][12 bytes of data = 3 floating point

numbers] [CRC(2 bytes)]

The list below is the default order of the 3X registers in

M550. The order can be altered using the Modbus Regis-

ters Tool Program, (see section 4), or by a suitable SCADA

program.

Modbus Add. Register Add. Register Name Order No.

30001 (0x00) V L1-2 1

30003 (0x02) V L2-3 2

30005 (0x04) V L3-1 3

30007 (0x06) V 1* 4

30009 (0x08) V 2* 5

30011 (0x0A) V 3* 6

30013 (0x0C) I 1 7

30015 (0x0E) I 2 8

30017 (0x10) I 3 9

30019 (0x12) W Sum 10

30021 (0x14) VA Sum 11

30023 (0x16) VAR Sum 12

30025 (0x18) PF Avg 13

30027 (0x1A) WHr (IMP) 14

30029 (0x1C) VArHr (IMP) 15

30031 (0x1E) Hz 16

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 54 55

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Multitek Comm-Box Spezifikationen Seite 39