Rockwell-automation 1769-ASCII Compact Module Manual de usuario descargar pdf (Pagina 17)

Compact 1769-ASCII Module 17

Publication

1769-IN068B-EN-P - May 2005

• CNO = Channel number of the output data being sent. This bit is set

by the PLC controller or other user program to tell the ASCII module

which port’s data is being sent to the ASCII module.

• R

eserved bits should be set to 0.

Alternate Mode (One Channel at a Time) Input File

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

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

• Tx = Transmit

• Rx = Receive

• TS = T

ransmit sent. Indicates the ASCII module has sent the data

indicated by the Tx Transaction ID and can accept more transmit

data.

• ND =

New data. Only used for Handshake mode.

• HE =

Handshake error. Only used for Handshake mode.

Word

Bit Position

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

0 Tx ID 0 Acknowledged Rx Transaction ID Ch0

1 15 14 13 12 11 10 TG0 TS0 ND

HE0 NR

RF0 TF0 PA0 RO0 TO0

2 Tx ID 1 Acknowledged Rx Transaction ID Ch1

3 15 14 13 12 11 10 TG1 TS1 ND

HE1 NR

RF1 TF1 PA1 RO1 TO1

4 Reserved CNI

5 Reserved CNO

6 Firmware Revision, Major Firmware Revision, Minor

7 Length (Number of Bytes)

8 Character 1 Character 0

9 Character 3 Character 2

… Character … Character …

106 Character 197 Character 196

107 Character 199 Character 198

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 39 40

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Rockwell-automation 1769-ASCII Compact Module Manual de usuario Pagina 17