Rockwell Automation 1771-IE,D17716.5.7 ANAL.INPUT MOD. User Manual
Page 22
Programming the Analog Input Module
Chapter 4
4Ć3
BTR data (control) address is 030
BTR file address is 050
FFM counter address is 043
FFM number of words moved
is
8
FFM source file A is 050
FFM destination file R is 150
FFM rate per scan is 8
Figure 4.2
Example Program for PLCĆ2 Family Processors (Local Chassis)
EN
BLOCK XFER READ
DATA ADDR:
MODULE ADDR:
BLOCK LENGTH:
FILE:
030
120
08
050 - 057
DN
BTR
DN
FILE TO FILE MOVE
COUNTER ADDR:
POSITION:
FILE LENGTH:
FILE A:
FILE R:
RATE PER SCAN:
EN
DN
Rung 1
Rung 2
012
07
112
07
043
17
043
15
043
000
08
050 - 057
150 - 157
08
112
07
IOT
012
Rung 3
Use only when 1771-IE is in a local chassis and block transfers to this
module are inhibited.
Important: When your input module is in a local I/O chassis, random
chance could allow block transfer requests to occur during module
housekeeping and prevent block transfers. This condition is apparent
when the done bit remains reset and no new data is transferred. If this
condition should occur, we recommend that you add rung 3 to your
program. It guards against the possibility of the processor repeatedly
asking for a block transfer each time the module inhibits block transfers
while updating its inputs.