Rockwell Automation 1771-PD PID MODULE (+DU) - Manual (Page 180)

Application Example 1, Continuous Block
Transfer
Appendix B
BĆ21
Figure B.6
PLCĆ3 Continuous Block Transfer Program
TE
ONE SHOT
CPU SCANS
TP =
TA =
T0000
1
0
TT
EN
BTR
BLOCK XFER READ
RACK :
GROUP :
MODULE:
002
1
0 = LOW
FB002:0000
DN
0
FB003:0000
ER
DATA :
LENGTH =
CNTL:
] [ ] [ LBL
I0012
00000 00
TOS
T0000
17
T0000
16
THIS RUNG ENERGIZES T1/16 FOR ONE CPU SCAN WHEN PUSHBUTTON 012/00 IS CLOSED. THIS BIT THEN SETS THE
LOAD" BIT IN RM5 TO INITIATE A LOAD/ENTER SEQUENCE
CNTL
12
CNTL
15
CNTL
13
] [ ] [ LBL
WB003:0000
00001 15
PERFORMS A READ" OF THE STATUS BLOCK FROM THE -PD MODULE AND TRANSFERS THAT BLOCK INTO A USER-SPECIFIED
BUFFER AREA. (*NOTE*-BLOCK TRANSFER RUNG MUST BE CONDITIONED WITH AN XIO" OF ITS' RESPECTIVE DONE" BIT)
EN
MVF
FILES FROM A TO R
A : FB002:0000
R : FB000:0057
COUNTER:
0/ 18
DN
ALL/SCAN
C0006
ER
POS/LEN =
MODE =
C0006
12
15
13
RUNG NUMBER RM0
RUNG NUMBER RM1
C0006
C0006
] [ ] [ LBL
WB003:0000
00002 15
UPON COMPLETION OF A SUCCESSFUL READ" OF THE STATUS BLOCK INTO THE BUFFER AREA, (SIGNIFIED BY AN
ON" CONDITION OF THE READ BLOCK TRANSFER DONE" BIT) THE STATUS BLOCK IS MOVED FROM THE BUFFER TO THE
USER SPECIFIED STATUS AREA.
RUNG NUMBER RM2