Despatch Protocol Plus Modbus Communications Manuel d'utilisateur télécharger pdf (Page 39)

Chromalox Instruments and Controls

A-51643 Rev. 6 10/06/03 33

Function

$08

Function

$08

Sub-function hi

$00

Sub-function hi

$00

Sub-function lo

$0E

Sub-function lo

$0E

Data hi

$00

Data hi

$00

Data lo

$00

Data lo

$6C

CRC

$----

CRC

$----

5.3.1.9 [08 15] Return Slave No Response Count

The response data field returns the quantity of messages addressed to the slave for which it returned no

response since its last reset or clear counters command. No response due to errors are not counted.

Example: Return slave no response count in slave device 9.

Query

Response

Field Name

Data

Field Name

Data

Slave address

$09

Slave address

$09

Function

$08

Function

$08

Sub-function hi

$00

Sub-function hi

$00

Sub-function lo

$0F

Sub-function lo

$0F

Data hi

$00

Data hi

$00

Data lo

$00

Data lo

$02

CRC

$----

CRC

$----

5.3.1.10 [08 18] Return Bus Character Overrun Count

The response data field returns the quantity of messages addressed to the slave that it could not handle

because of communication port overrun, framing errors, or parity errors since its reset or clear counters

command.

Example: Return bus character overrun count in slave device 1.

Query

Response

Field Name

Data

Field Name

Data

Slave address

$01

Slave address

$01

Function

$08

Function

$08

Sub-function hi

$00

Sub-function hi

$00

Sub-function lo

$12

Sub-function lo

$12

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Despatch Protocol Plus Modbus Communications Manuel d'utilisateur Page 39

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