Omron C200HG Manual Do Utilizador

Work bits can be used to simplify programming when a certain combination of
conditions is repeatedly used in combination with other conditions. In the follow-
ing example, IR 00000, IR 00001, IR 00002, and IR 00003 are combined in a
logic block that stores the resulting execution condition as the status of IR
24600. IR 24600 is then combined with various other conditions to determine
output conditions for IR 00100, IR 00101, and IR 00102, i.e., to turn the outputs
allocated to these bits ON or OFF.

00000

00003

00001

00004

00002

00005

00004

00007

00006

00005

24600

24600

24600

24600

00100

00101

00102

00000

LD

00000

00001

AND NOT

00001

00002

OR

00002

00003

OR NOT

00003

00004

OUT

24600

00005

LD

24600

00006

AND

00004

00007

AND NOT

00005

00008

OUT

00100

00009

LD

24600

00010

OR NOT

00004

00011

AND

00005

00012

OUT

00101

00013

LD NOT

24600

00014

OR

00006

00015

OR

00007

00016

OUT

00102

Work bits can also be used if differential treatment is necessary for some, but not
all, of the conditions required for execution of an instruction. In this example, IR
00100 must be left ON continuously as long as IR 00001 is ON and both IR
00002 and IR 00003 are OFF, or as long as IR 00004 is ON and IR 00005 is OFF.
It must be turned ON for only one cycle each time IR 00000 turns ON (unless one
of the preceding conditions is keeping it ON continuously).