Despatch Protocol 3 Modbus Communications Manual do Utilizador descarregar pdf (Página 12)

ABOUT THIS MANUAL Modbus Programming Manual

12 Version 2

means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and

retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

The Modbus parameter register addresses are detailed in the following sections.

The Access column indicates if a parameter is read only (RO) or if it can also be written to

(R/W).

Note:

Some parameters that do not apply for a particular configuration will accept reads and

writes. Read only parameters will return an exception if an attempt is made to write values

to them.

1.4.8. Data Formats

Data can be read or written in three formats: Integer Only, Integer with 1 Decimal Place and

Floating Point Number.

The Modbus Address column shows the register address for each parameter in integer format.

Other formats can be calculated from the Integer Only address.

When working in Hexadecimal, the format calculations are:

Address for Integer with 1 Decimal Place = Integer address plus 0x4000

Address for Floating Point = Integer address multiplied by 2, plus 0x8000

When working in Decimal, the format calculations are:

Address for Integer with 1 Decimal Place = Integer address plus 16384

Address for Floating Point = Integer address multiplied by 2, plus 32768

Example Register Address Calculations

Calculating Parameter Register Addresses

Integer Only

Integer+1

Floating Point

Calculation

(hex)

Address

Address + 0x4000

Address x 2 + 0x8000

(dec)

Address

Address + 16384

Address x 2 + 32768

Address Example:

(For Process Variable)

(hex)

0x0407

0x4407

0x880E

(dec)

1031

17415

34830

Data Value Returned:

If actual Value = 23.9 decimal

(hex)

0x00, 0x17

0x00, 0xEF

0x41, 0xBF, 0x33, 0x33

(dec)

239

23.9 as floating decimal

Address Example:

(For Selected Setpoint)

(hex)

0x101F

0x501F

0xA03E

(dec)

4127

20511

41022

Data Value Returned:

If Value = 1 (Alternative SP)

(hex)

0x00, 0x01

0x00, 0x0A

0x3F, 0x80, 0x00, 0x00

(dec)

1.0

as floating decimal

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 51 52

Comentários a estes Manuais

Sem comentários

Despatch Protocol 3 Modbus Communications Manual do Utilizador Página 12

Comentários a estes Manuais

Manuais e produtos relacionados com Painel de controlo Despatch Protocol 3 Modbus Communications