Rockwell-automation 1769-ASCII Compact I/O ASCII Module Manual de usuario descargar pdf (Pagina 73)

Rockwell Automation Publication 1769-UM012B-EN-P - January 2014 73

I/O Memory Mapping Chapter 3

Alternate Mode (one channel

at a time) Input File

One channel’s data is received and stored in the input file at a time. The Channel

Number (CN) bit defines the channel whose data is returned. The alternate

mode input file contains the real-time input data from the module with a header

and data section for each channel. This table illustrates the maximum size

allowed.

Table 6 - Alternate Mode (one channel at a time) Input File Tags

Word

Bit Position

Add-On-Profile Tag

Name

Description

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

Generic Module Tag Names

0 Tx ID 0 Acknowledged Rx Transaction ID Ch0 Local:S:I.Ch0TxIACK

(1)

Local:S:I.Ch0RxID

Receive Transaction ID Request. Used with Ch0RxID

for handshake mode.

1Reserved

(2)

Local:S:I.Ch0Status Ch0 Status. See Status Descriptions on page 76.

2 Tx ID 1 Acknowledged Rx Transaction ID Ch1 Local:S:I.Ch0TxAck

Local:S:I.Ch0RxID

Receive Transaction ID Request. Used with Ch1RxID

for handshake mode.

3 151413121110TG1TS1ND1HE1NR1RF1TF1PA1RO1TO1Local:S:I.Ch1Status Ch1 Status. See Status Descriptions

on page 76.

4 Reserved CNI Local:S:I.RxChNumber Channel number of the input data. This bit is set by

the 1769-ASCII module to tell the user program

from which port the data was received.

5 Reserved CNO Local:S:I.TxChNumber Channel number of the output data most recently

received. This bit is set by the ASCII module to tell

the user program that it has received the data to

transmit out the specified port.

Firmware Revision, Major Firmware Revision, Minor

6 Length (Number of Bytes) Local:S:I.RxDataLength The amount of data being received.

7Reserved

8 Character 1 Character 0 Local:S:I.RxData This defines the receive ASCII character for the tag.

9 Character 3 Character 2 Local:S:I.RxData

… Character … Character … Local:S:I.RxData

106 Character 197 Character 196 Local:S:I.RxData

107 Character 199 Character 198 Local:S:I.RxData

(1) Tag name format is `Local:S:I’ where `S’ represents slot number.

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

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 117 118

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