Rockwell-automation 1769-ASCII Compact I/O ASCII Module Manual de usuario descargar pdf (Pagina 75)

Rockwell Automation Publication 1769-UM012B-EN-P - January 2014 75

I/O Memory Mapping Chapter 3

Simultaneous Mode

(two channels) Output 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 8 - Simultaneous Mode (two channels) Output File Tags

Word

Bit Position

Add-On-Profile Tag

Name

Descriptions

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Channel 0 Data

Generic Module Tag Names

0Reserved

(1)

Tx Transaction ID Local:S:O.Ch0TxId Transmit Transaction ID.

1 Reserved Rx Transaction ID Request Local:S:O.Ch0RxId

(2)

Receive Transaction ID Request. Used with

Ch1RxID for handshake mode.

2Reserved

3 Length (Number of Bytes) Local:S:O.Ch0TxDataLength The amount of data being transmitted.

4 Character 1 Character 0 Local:S:O.Ch0TxData This defines the transmit ASCII character for

the tag.

5 Character 3 Character 2 Local:S:O.Ch0TxData

… Character … Character … Local:S:O.Ch0TxData

(3)

Last Character Character … Local:S:O.Ch0TxData

Channel 1 Data

x+1 Reserved Tx Transaction ID Local:S:O.Ch1TxId Transmit Transaction ID.

x+2 Reserved Rx Transaction ID Request Local:S:O.Ch1RxId

(4)

Receive Transaction ID Request. Used with

Ch0RxID for handshake mode.

x+3 Reserved

x+4 Length (Number of Bytes) Local:S:O.Ch1TxDataLength The amount of data being transmitted.

x+5 Character 1 Character 0 Local:S:O.Ch1TxData This defines the transmit ASCII character for

the tag.

x+6 Character 3 Character 2 Local:S:O.Ch1TxData

… Character … Character … Local:S:O.Ch1TxData

(5)

Last Character Character … Local:S:O.Ch1TxData

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

(2) Used for handshaking.

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

(4) Used for handshaking.

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

1 2 ... 70 71 72 73 74 75 76 77 78 79 80 ... 117 118

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