See figure 4.3 for the block transfer i/o image – Rockwell Automation 20-COMM-R Remote I/O Adapter User Manual
Page 57
Using Discrete and Block Transfer I/O
4-21
20-COMM-R Remote I/O Adapter User Manual
Publication 20COMM-UM004D-EN-P
Figure 4.14 SLC 500 Example Ladder Logic for Block Transfer I/O Write
See
for the Block Transfer I/O image.
This rung executes once each time the SLC is switched into RUN mode. It resets any BTW control bits that might be set in the RIO scanner.
0000
S:1
15
First Pass
MOV
Move
Source
0
0<
Dest
N10:0
-32768 <
MOV
I/O BTW Control
COP
Copy File
Source
#N10:0
Dest
#M0:1.100
Length
28
COP
This rung transfers the Block Transfer Write (BTW) status buffer from the RIO scanner to the memory in the SLC. When the BTW is
complete, the data in this file will indicate if the BTW was successful or not.
0001
COP
Copy File
Source
#M1:1.100
Dest
#N10:100
Length
28
COP
I/O BTW Status
This rung enables the BTW on the first pass through the program and re-enables it each time the BTW is completed or errors.
0002
N10:100
13
I/O BTW DN (Done)
N10:100
12
I/O BTW ER (Error)
S:1
15
First Pass
N10:0
15
BT Enable
This rung transfers the BTW information (control and data) to the RIO scanner for execution.
N10:10 = Reference
N10:12 = Datalink A1
N10:14 = Datalink A2
0003
COP
Copy File
Source
#N10:0
Dest
#M0:1.100
Length
28
COP
0004
END