Rockwell-automation 2711P Creating Modbus Applications Instrukcja Użytkownika Pobierz pdf (Strona 67)

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

Modbus/TCP Address Definitions 67

Mailbox Addressing

Default types are shown in bold.

Arrays

Arrays are also supported for the holding register addresses. The

syntax for declaring an array (using decimal addressing) is 4xxxx[cols]

with assumed row count of 1 and 4xxxx[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 holding register block size that was specified for this

device.

Mailbox Addressing

Decimal Addressing Hexadecimal Addressing

Type Word, Short, BCD

Format 4xxxxx H4yyyyy

Security Read/Write

Range 1 - 65536 1 - 10000

Type Boolean

Format 4xxxxx.bb H4yyyyy.c

Security Read/Write

Range xxxxx.0 - xxxxx.15 yyyyy.0 - yyyyy.F

Type Float, DWord, Long, LBCD

Format 4xxxxx H4yyyy

Security Read/Write

Range 1 - 65535 1 - FFFF

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 91 92

Brak uwag

Rockwell-automation 2711P Creating Modbus Applications Instrukcja Użytkownika Strona 67