Rockwell-automation 1769-ASCII Compact I/O ASCII Module Manual de usuario descargar pdf (Pagina 74)

74 Rockwell Automation Publication 1769-UM012B-EN-P - January 2014

Chapter 3 I/O Memory Mapping

Simultaneous Mode

(two channels) Input File

In Simultaneous mode, the data is packed in the buffer as follows:

• Four words of channel 0 header information

• Channel 0 data of a quantity defined by the Max_Receive_Size parameter

• Four words of channel 1 header information

• Channel 1 data of a quantity defined by the Max_Receive_Size parameter

This table illustrates the maximum size allowed.

Table 7 - Simultaneous Mode (two channels) Input File Tag Definitions

Word

Bit Position

Add-On-Profile Tag

Name

Description

151413121110987654321 0

Channel 0 Data

Generic Module Tag Names

0 Tx ID Acknowledged Rx Transaction ID Local:S:I.Ch0TxAck

Local:S:I.Ch0RxID

This is a feedback status of Tx ID most

recently transmitted.

Receive Transaction ID Request. Used

with Ch1RxID for handshake mode.

1Reserved

(1)

TG0 TS0 ND0 HE0 NR0 RF0 TF0 PA0 RO0 TO0 Local:S:I.Ch0Status See Status Descriptions on page 76.

2 Firmware Revision, Major Firmware Revision, Minor Firmware not included in the Add-On

Profile.

3 Length (Number of Bytes) Local:S:I.Ch0RxDataLength The amount of data being

transmitted.

4 Character 1 Character 0 Local:S:I.Ch0RxData This defines the receive ASCII

character for the tag.

5 Character 3 Character 2 Local:S:I.Ch0RxData

… Character … Character … Local:S:I.Ch0RxData

(2)

Last Character Character … Local:S:I.Ch0RxData

Channel 1 Data

x+1 Tx ID Acknowledged Rx Transaction ID Local:S:I.Ch1TxAck

Local:S:I.Ch1RxID

This is a feedback status of Rx ID

most recently transmitted.

Receive Transaction ID Request.

x+2 Reserved TG1 TS1 ND1 HE1 NR1 RF1 TF1 PA1 RO1 TO1 Local:S:I.Ch1Status See Status Descriptions

on page 76.

x+3 Firmware Revision, Major Firmware Revision, Minor Firmware not included in the Add-On

Profile.

x+4 Length (Number of Bytes) Local:S:I.Ch1RxDataLength The amount of data being

transmitted.

x+5 Character 1 Character 0 Local:S:I.Ch1RxData This defines the receive ASCII

character for the tag.

x+6 Character 3 Character 2 Local:S:I.Ch1RxData

… Character … Character … Local:S:I.Ch1RxData

(3)

Last Character Character … Local:S:I.Ch1RxData

(1) Reserved is expected in 1st instance word 0.

(2) X is calculated based on the size of Channel 0 data as specified in the input file. Both channels cannot contain 200 characters as the total configuration file size can be only 108 words.

(3) Y is the connection size minus 1, with a maximum value of 107 for a buffer size of 108.

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 117 118

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