Rockwell-automation 1769-ASCII Compact Module Uživatelský manuál stáhnout pdf (Strana 21)

Compact 1769-ASCII Module 21

Publication

1769-IN068B-EN-P - May 2005

Simultaneous Mode (Two Channels) Output File

Maximum size is shown below. Refer to the Compact I/O 1769-ASCII

Module User Manual, publication 1769-UM012, to use smaller output files.

• Tx = T

ransmit

• Rx

= Receive

Word

Bit Position

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

Channel 0 Data

0 Reserved Tx Transaction ID

1 Reserved Rx Transaction ID Request

2 Reserved

3 Length (Number of Bytes)

4 Character 1 Character 0

5 Character 3 Character 2

… Character … Character …

(1)

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 file size can be only 108 words.

Last Character Character …

Channel 1 Data

x+1 Reserved Tx Transaction ID

x+2 Reserved Rx Transaction ID Request

x+3 Reserved

x+4 Length (Number of Bytes)

x+5 Character 1 Character 0

x+6 Character 3 Character 2

… Character … Character …

(2)

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

Last Character Character …

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 39 40

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Rockwell-automation 1769-ASCII Compact Module Uživatelský manuál Strana 21