Siemens SIMATIC S5 Manual page 127

Programming the IP 265 with COM 265
Clockpulse generator (Clock)
The IP 265 user program may include clock-pulse generators with variable clock frequencies. You
may choose between 8 different frequencies. Select the required frequency in the menu line for the
relevant language element.
Function key
Clock frequency
Clock-pulse generator
Clock-pulse generator "Clock pulse":
The language element has one binary input (EN) and
one binary output (Q). When the signal state at the
input is "1", a clock pulse is generated at the output.
The selected frequency is in the upper portion of the
language element.
Example: Output 0.5 is clocked at 1 kHz when
input 0.0 is "1".
In IP 265 user programs, the clock-pulse generator is a separate language element. In STEP 5
(programming language for SIMATIC CPUs), there is no such language element.
Possible options for clock-pulse generators:
• The input can be inverted.
• The output can be inverted when it leads immediately to the control system flowchart's output
bar.
• The clock-pulse generator "Clock pulse" can be converted into type-conforming language
elements "EF", "2:1" and "D-FF".
9-22
Table 9-9. Menu Line "Clock-Pulse Generator"
F1 F2 F3
1 Hz 10 Hz 100 Hz
Table 9-10. Clock-Pulse Generator
F4 F5
500 Hz 1 kHz 2 kHz
CSF (example)
1 kHz
I 0.0 EN
Timing diagram
Signal states
1
0
1
0
IP 265
F6 F7 F8
16 kHz 64 kHz
Q 0.5
I 0.0
Q 0.5
Time
EWA 4NEB 812 6130-02a