Rockwell Automation 1771-DCM USER MANUAL 1771-DCM - Manual (Page 30)

Programming the 1771-DCM
Chapter 6
6Ć9
Figure 6.6
Block Transfer Programming Example for PLC-5 Family Supervisory Processor
Rung 2:2
PLC5 supervisory write rung. The DCM is connected via remote I/O to the PLC5, and is set for 57.6K baud, block
transfer, and rack 3. The supervisory processor's write length must match the local processor's read length.
Rung 2:3
PLC5 supervisory read rung. The DCM is connected via remote I/O to the PLC5, and is set for 57.6K baud, block
transfer, and rack 3. The supervisory processor's read length must match the local processor's write length.
BTR
ENABLE BIT
N22:0
15
N22:5
15
BTW
ENABLE BIT
EN
BTR
BLOCK TRNSFR READ
Rack
Group
Module
Control Block
3
0
0
N22:5
DN
Data file
Length
Continuous N19:40
27
N
ER
BTW
BLOCK TRNSFR WRITE
Rack
Group
Module
Control Block
3
0
0
N22:0
Data file
Length
Continuous N19:0
31
N
EN
DN
ER
BTR
ENABLE BIT
N22:0
15
N22:5
15
BTW
ENABLE BIT