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
Wo
rd
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
0
Reserved
(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.
2
Reserved
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
x
(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
y
(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.
Содержание Allen-Bradley 1769-ASCII
Страница 1: ...Compact I O ASCII Module Catalog Numbers 1769 ASCII User Manual ...
Страница 4: ...4 Rockwell Automation Publication 1769 UM012B EN P January 2014 Summary of Changes Notes ...
Страница 20: ...20 Rockwell Automation Publication 1769 UM012B EN P January 2014 Chapter 1 Compact I O ASCII Module Notes ...
Страница 65: ...Rockwell Automation Publication 1769 UM012B EN P January 2014 65 Configure the 1769 ASCII Module Chapter 2 ...
Страница 67: ...Rockwell Automation Publication 1769 UM012B EN P January 2014 67 Configure the 1769 ASCII Module Chapter 2 ...
Страница 86: ...86 Rockwell Automation Publication 1769 UM012B EN P January 2014 Chapter 3 I O Memory Mapping Notes ...
Страница 96: ...96 Rockwell Automation Publication 1769 UM012B EN P January 2014 Appendix B Status Indicators Notes ...
Страница 101: ...Rockwell Automation Publication 1769 UM012B EN P January 2014 101 Error Codes Appendix C ...
Страница 112: ...112 Rockwell Automation Publication 1769 UM012B EN P January 2014 Appendix E Using Electronic Keying Notes ...
Страница 114: ...114 Rockwell Automation Publication 1769 UM012B EN P January 2014 Appendix F History of Changes Notes ...
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