Siemens SIMATIC S7-200 - Page 254

SIMATIC Instructions
9-66
S7-200 Programmable Controller System Manual
A5E00066097-02
==I
SMW68
IN
1000
MOV_W
OUT SMW68
EN
Q0
PLS
EN
SMW68
IN500
MOV_W
OUT SMW68
EN
Q0.X0
PLS
EN
If current cycle time
is 500 ms, then set
cycle time of 1000 ms
and output 4 pulses.
If current cycle time
is 1000 ms, then set
cycle time of 500 ms
and output 4 pulses.
==I
Network 1
LDW= SMW68, 500
MOVW 1000, SMW68
PLS 0
CRETI
Network 2
LDW= SMW68, 1000
MOVW 500, SMW68
PLS 0
500 ms
1 cycle
4 cycles or 4 pulses
1000 ms
1 cycle
4 cycles or 4 pulses
Timing Diagram
Q0.0
Interrupt 3
occurs
Interrupt 3
occurs
RETI
Network 1
Network 2
500
1000
LAD STL
ENO
ENO
ENO
ENO
INTERRUPT 3
Figure 9-22 Example of a Pulse Train Output Using Single Segment Operation (continued)