Rockwell Automation 1771-DCM USER MANUAL 1771-DCM - Manual (Page 31)

Programming the 1771-DCM
Chapter 6
6Ć10
Figure 6.7
Block Transfer Programming Example for PLC-5/250 Supervisory Processor
Rung 1STEP0:0
PLC5/250 supervisory write rung. The DCM is connected via remote I/O to the PLC5/250. The DCM baud rate switch
setting must match that of its scanner channel. The DCM rack switches are set for rack 7. The local processor's read
length must match the supervisory processor's write length.
Rung 1STEP0:1
PLC5/250 supervisory read rung. The DCM is connected via remote I/O to the PLC5/250. The DCM baud-rate switch
setting must match that of its scanner channel. The DCM rack switches are set for rack 7. The local processor's write
length must match the supervisory processor's read length.
BTR
ENABLE BIT
BW070:0
EN
BR070:0
EN
BTW
ENABLE BIT
EN
BTR
BLOCK TRNSFR READ
Rack
Group
Module
Control Block
007
0
0
BR070:0
DN
Data file
Length
Continuous 1BTD3:1
15
NO
ER
BT Timeout 4
BTR
ENABLE BIT
BW070:0
EN
BR070:0
EN
BTW
ENABLE BIT
EN
BTW
BLOCK TRNSFR WRITE
Rack
Group
Module
Control Block
007
0
0
BW070:0
DN
Data file
Length
Continuous 1BTD2:1
17
NO
ER
BT Timeout 4