Rockwell Automation RECOMM-DNET DeviceNet Adapter for use with DPI AC Drives - Manual (Page 63)

Using I/O Messaging 6-9
6.6.2 Sample PLC-5 Ladder Logic Program
Table 6.2 – Control File for Block Transfers
EN ST DN ER CO EW NR TO RW RLEN DLEN FILE ELEM R G S
BT20:0 0 0 0 0 0 0 0 0 0 62 0 9 0 00 0 0
BT20:1 0 0 0 0 0 0 0 0 0 62 0 10 0 00 0 0
Figure 6.5 – Sample PLC-5 Ladder Logic Program
0000
BT20:0
EN
EN
DN
ER
BTR
Block Transfer Read
Module Type Generic Block Transfer
Rack
000
Group 0
Module 0
Control Block BT20:0
Data File N9:0
Length 62
Continuous No
0001
N9:1
1
SP600
RUNNING
Status Bit
O:000
10
Operator Display
Drive Running
Status Bit
0002
N9:1
7
SP600
FAULTED
Status Bit
O:000
11
Operator Display
Drive Faulted
Status Bit
0003
MO
Move
Source
N9:2
0<
Dest N21:1
0<
MOV
Operator Display
Drive Feedback
Status Word
0004
N10:0
0
1771-SDN Scanner
Port A Enable
0005
I:000
10
Operator Input
Drive Start
Command Bit
N10:1
1
SP600
START
Command Bit
The scanner gathers drive data via the DeviceNet network. The Block Transfer Read
in this rung then moves the drive status data from the scanner to the N9 data file in the
PLC.
These rungs move the drive status
from the Block Transfer Read data
to an operator display.
This rung enables the scanner.
These rungs move the inputs of the
operator station to the Block Transfer Write
data file. They will then be sent to the
scanner and out to the drive via the
DeviceNet network.