Direct Signal Status Display - Siemens Simatic S5 Operating Instructions Manual

Test and Service
Direct signal status display
C a l l f u n c t i o n s e l e c t i o n menu w i t h
S e l e c t PU-function
Nomenclature i n menu:
D I R .
SIGNATJ STATUS
Example:
I
1.1
End f u n c t i o n
T h i s function is o n l y p o s s i b l e i n o p e r a t i n g
mode 21 "PC W I T H PC-MEM" (only w i t h
P C S5-130A/K) o r 22 "PC WITH PU-MEM".
I n each case t h e s i g n a l s t a t u s of an
i n p u t
( I ) ,
an output
( Q ) ,
a f l a g (F)
,
a t i m e r (T) o r a c o u n t e r
(C)
may be
i n t e r r o g a t e d .
Notes:
I f t h e s t a t u s d i s p l a y i s t o b e c a r r i e d o u t
i n o p e r a t i n g mode 21 "PC WITH PC-MEM"
and with t h e switch on t h e C P U i n t h e
"CYCLE" p o s i t i o n , then t h e f u n c t i o n "Transfer
c o n t e n t s of PC-memory i n t o PU-memory"
(page 35) must be c a r r i e d o u t f i r s t i f t h e
PU-memory does n o t c o n t a i n t h e same program
a s t h e PC.
I n o p e r a t i n g mode 21 "PC WITH PC-MEM"
and 22 "PC W I T H P U - M E M " and w i t h t h e
switch on t h e C P U i n "CYCLE" p o s i t i o n ,
s i g n a l s t a t u s d i s p l a y i s o n l y p o s s i b l e , i f
t h e operand i s contained i n t h e program.
With P C S5-110A/-010 s i g n a l s t a t u s d i s p l a y s '
a r e only p o s s i b l e i f t h e s w i t c h on t h e C P U i s
i n t h e
"CYCLE"
p o s i t i o n .
30