Rockwell Automation 20-COMM-R Remote I/O Adapter - Manual (Page 73)

Using Block Transfer Messaging 5-15
20-COMM-R Remote Adapter I/O User Manual
Publication 20COMM-UM004D-EN-P
Figure 5.6 SLC 500 Example Ladder Logic for Block Transfer Messaging - continued
This rung executes once each time the SLC is switched into RUN mode. It resets any BTR control bits that might be set in the RIO scanner.
0005
S:1
15
First Pass
MOV
Move
Source
128
128 <
Dest N13:0
128 <
MOV
COP
Copy File
Source
#N13:0
Dest #M0:1.400
Length 74
COP
This rung transfers the Block Transfer Read (BTR) status buffer from the RIO scanner to the memory in the SLC. When the BTR is complete,
the data in this file will indicate if the BTR was successful or not. This file will also contain the response to the previous BTW message.
0006
COP
Copy File
Source
#M1:1.400
Dest #N13:100
Length 74
COP
This rung will wait until a BTR is available from the 20-COMM-R module and then execute a BTR.
0007
I:1.8
10
1747-SN
Message
BT Read
Available
L
N13:0
15
Message BTR
BT EN (Enable)
U
N12:0
15
Message BTW
BT EN (Enable)
When the BTR is completed, this rung will disable the BTR.
0008
N13:100
13
Message BTR
BT DN (Done)
U
N13:0
15
Message BTR
BT EN (Enable)
This rung transfers the BTR information to the RIO scanner for execution.
0009
COP
Copy File
Source
#N13:0
Dest #M0:1.400
Length 74
COP
0010 END