Rockwell Automation 20-COMM-R Remote I/O Adapter - Manual (Page 52)

4-16 Using Discrete and Block Transfer I/O
20-COMM-R Remote I/O Adapter User Manual
Publication 20COMM-UM004D-EN-P
Figure 4.10 PLC-5 Example Ladder Logic for Block Transfer I/O (Read/Write)
See Figure 4.3 for the Block Transfer I/O image.
This run executes an I/O BTR to move status information from the 20-COMM-R to the PLC. Note that this is the minimum logic needed -- a more complex system
may require additional sequencing logic.
0000
BT9:0
EN
EN
DN
ER
BTR
Block Transfer Read
Module Type Generic Block Transfer
Rack 001
Group 0
Module 0
Control Block BT9:0
Data File N11:0
Length 18
Continuous No
BTR
This run executes an I/O BTW to move status information from the PLC to the 20-COMM-R. Note that this is the minimum logic needed -- a more complex system
may require additional sequencing logic.
0001
BT9:1
EN
EN
DN
ER
BTW
Block Transfer Write
Module Type Generic Block Transfer
Rack 001
Group 0
Module 0
Control Block BT9:1
Data File N10:0
Length 18
Continuous No
BTW
0002 END
N11:0 = Feedback
N11:2 = Datalink A1 Read
N11:4 = Datalink A2 Read
N10:0 = Feedback
N10:2 = Datalink A1 Write
N10:4 = Datalink A2 Write