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

Page 214

Application Example 2, Periodic Block

Transfer

Appendix C

CĆ30

RUNG NUMBER RM7

THIS RUNG READS THE STATUS BLOCK FROM THE 1771-PD MODULE AND TRANSFERS IT INTO A BUFFER

UPON COMPLETION OF A VALID 'READ' OF THE STATUS BLOCK INTO THE BUFFER AREA

STORAGE BIT W0001:0000/01 IS UNLATCHED BY THE READ BLOCK TRANSFER 'DONE' BIT.

00007

W0001:0000

W0003:0000

LBL

FILE (BINARY FILE 2). THIS OCCURS ON A LOAD/ENTER REQUEST (STORAGE BIT W0001:0000/00 SET) OR A TIMER

INITIATED REQUEST (BIT W0001:0000/01 SET). (*NOTE* Ć BLOCK TRANSFER RUNG MUST BE CONDITIONED WITH

AN 'XIO' OF ITS RESPECTIVE 'DONE' BIT.).

CNTL

RUNG NUMBER RM8

(SIGNIFIED BY AN 'ON' CONDITION OF THE READ BLOCK TRANSFER 'DONE' BIT), THE STATUS BLOCK

IS MOVED FROM THE FBUFFER AREA TO THE USER-SPECIFIED STATUS AREA.

00008

WB003:0000

LBL

C0001

RUNG NUMBER RM9

00009

WB003:0000

LBL

W0001:0000

BTR
BLOCK XFRER READ
RACK:
GROUP:
MODULE:
DATA:

002

0 = LOW

FB002:0000

LENGTH:

CNTL:

FB003:0000

MVF
FILES FROM A TO R
A : FB002:0000
R : FB000:0057
COUNTER:
POS/LEN =

C0001

0/ 18

MODE =

ALL/SCAN