Allen-Bradley 5069-SERIAL, User Manual, Page: 31 / 110

Rockwell Automation Publication 5069-UM003A-EN-P - May 2018 31
Compact 5000 I/O Serial Module Features Chapter 3
Data Exchange Generic ASCII Data Exchange
The following illustrations show the different data exchanges using the serial
module.
Data Sent with the Serial Port
Data is sent out of the serial port using the following steps:
1. The controller sends out the consumed packet with an incremented
TxID.
2. The serial module puts the packet into the TxBuffer.
3. The serial module takes the oldest data from the TxBuffer and sends it
out to the target.
Figure 6 - Data Sent out to the Serial Port
Consume Data
RPI Comes
Send
Data
Controller
5069-SERIAL
TxBuffer
TxID
Update
TxID
Non-Update
Garbage
Data
The Latest Data
Transmit Data
Transmit Data
The Oldest Data
Binary
Data
TxFIFO
Binary
Data
UART
Receive
Data
Target