Rockwell-automation 2711P Creating Modbus Applications Uživatelský manuál stáhnout pdf (Strana 74)

Publication 2711P-UM002B-EN-P - March 2007

74 Modbus Unsolicited Serial Address Definitions

Internal Registers

Defaults are shown in bold.

Arrays

Arrays are also supported for the internal and holding register

addresses. The syntax for declaring an array (using decimal

addressing) is 3xxxx[cols] with assumed row count of 1 and

3xxxx[rows][cols].

For Word, Short and BCD arrays, the base address + (rows * cols)

cannot exceed 65536.

For Float, DWord, Long and Long BCD arrays, the base address +

(rows * cols * 2) cannot exceed 65535.

For all arrays, the total number of registers being requested cannot

exceed the internal register block size that was specified for this

device.

Internal Registers

Decimal Addressing

Type Word, Short, BCD

Format 3xxxxx

Security

Read only

(1)

For unsolicited device 127.0.0.1.0, these locations are Read/Write.

Range 300000 - 309999

Type Boolean

Format 3xxxxx.bb

Security

Read only

(1)

Range 3xxxxx.0 - 3xxxxx.15

Type Float, DWord, Long, LBCD

Format 3xxxxx

Security

Read only

(1)

Range 300001 - 309998

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 91 92

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Rockwell-automation 2711P Creating Modbus Applications Uživatelský manuál Strana 74