Despatch Protocol 3 Modbus Communications Uživatelský manuál stáhnout pdf (Strana 46)

ADDRESS LIST Modbus Programming Manual

46 Version 2

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Command Response Name

Two Byte Response

Description

type defined

Auto Hold Type Invalid

0xF0

0x0E

The auto hold type is not recognized

Auto Hold Value Invalid

0xF0

0x0F

The auto hold value is not within input span

Events Value Invalid

0xF0

0x10

The events are not within range

No Segments Remaining

0xF0

0x11

There are no more segments available

Write Length Invalid

0xF0

0x12

The number of parameters to be written are invalid for

the function requested

Segment Setpoint Clamped

0xF0

0x13

The setpoint value entered was out of bounds. It has

been clamped within the units setpoint limits.

2.9.5.10. Reading a Profile Header (Command Code RP)

Read A Profile Header - Request (to instrument)

Field Name

Data

Comments

(Dec)

(Hex)

Unit Address

A/R

The ID address of the instrument

Function Code

Requires the multi read/write function

Read Start Address High Byte

Read Start Address Low Byte

Read Quantity Of Registers High Byte

Read Quantity Of Registers Low Byte

Write Start Address High Byte

Write Start Address Low Byte

Write Quantity Of Registers High Byte

Write Quantity Of Registers Low Byte

Byte Count

Command Code High Byte

Command Code Low Byte

Profile Number High Byte

A/R

Number of the profile to read

Profile Number Low Byte

A/R

CRC High Byte

A/R

CRC Low Byte

A/R

The instrument replies to the Read A Profile Header request as follows:

Read Profile Header - Response (from instrument)

Field Name

Data

Comments

(Dec)

(Hex)

Unit Address

A/R

The ID address of the instrument

Function Code

The multi read/write function

Byte Count

Profile Name Character 1

A/R

The ASCII codes equivalent to each of the

16 characters of the profile name, e.g. :

A = 65dec / 0x41, B = 66dec / 0x42 etc

a = 97dec / 0x61, b = 98dec / 0x62

The space character (32dec / 0x20hex) is

Profile Name Character 2

A/R

Profile Name Character 3

A/R

Profile Name Character 4

A/R

Profile Name Character 5

A/R

Profile Name Character 6

A/R

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 52

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