Rockwell-automation 1734-485ASC POINT I/O ASCII User Manual Manuel d'utilisateur télécharger pdf (Page 45)

Publication 1734-UM009B-EN-P - July 2003

Configuring Your ASCII Module 2-19

Setting Up the Scanner I/O Receive Size

The ASCII modules automatically calculate the number of bytes it will

send to the DeviceNet master. Its value is determined by a

combination of the incoming data and the options you have selected.

Parameter 13 defines the size of the DeviceNet message to be sent by

the ASCII module to the master.

Table 2.4 Receive Data Format - Array Data Type

Byte 1 Byte 2 Byte 3 Byte 4 Byte 5-X Byte X+1

(Max = 132)

RX Transaction ID

Byte

Status Byte Reserved Reserved ASCII Data

(max 128 bytes)

<CR>

(Terminator)

Table 2.5 Receive Data Format - Short_String Data Type

Byte 1 Byte 2 Byte 3 Byte 4 Byte 5-X Byte X+1

(Max = 132)

RX Transaction ID

Byte

Status Byte Reserved Length ASCII Data

(max 128 bytes)

<CR>

(Terminator)

Table 2.6 Receive Data Format - String Data Type

Byte 1 Byte 2 Byte 3 Byte 4 Byte 5-X Byte X+1

(Max = 132)

RX Transaction ID

Byte

Status Byte Length (Low Byte) Length (High Byte) ASCII Data

(max 128 bytes)

<CR>

(Terminator)

IMPORTANT

You must set your scanner’s RX (receive) value to

this number of bytes.

IMPORTANT

You must upload this data from the ASCII module to

view current information or put your RSNetWorx for

DeviceNet into Monitor Mode.

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Rockwell-automation 1734-485ASC POINT I/O ASCII User Manual Manuel d'utilisateur Page 45