[?]: Sampling Frequency Problem with OB35
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- Posts: 7
- Joined: Sun Feb 08, 2009 9:59 am
[?]: Sampling Frequency Problem with OB35
Hello
I am having a problem with OB35 I am calling OB35 with 100Hz frequency each 10ms and sometimes PLC gives SF.
What is the real limit for OB35?
Also I have a bigger problem.
I have to produce a 6Hz sine wave with 315-2dp but I cant manage to create a proper sinewave with 100Hz. I only have 16 samples per period which is not enough.
Have anyone seen this kind of problem before?
Is there any way to overcome this problem. Thanks.
I am having a problem with OB35 I am calling OB35 with 100Hz frequency each 10ms and sometimes PLC gives SF.
What is the real limit for OB35?
Also I have a bigger problem.
I have to produce a 6Hz sine wave with 315-2dp but I cant manage to create a proper sinewave with 100Hz. I only have 16 samples per period which is not enough.
Have anyone seen this kind of problem before?
Is there any way to overcome this problem. Thanks.
Last edited by ErdemSivri on Wed Aug 12, 2009 5:18 am, edited 1 time in total.
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- Posts: 7
- Joined: Sun Feb 08, 2009 9:59 am
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- Posts: 7
- Joined: Sun Feb 08, 2009 9:59 am
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- Posts: 7
- Joined: Sun Feb 08, 2009 9:59 am
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- Posts: 7
- Joined: Sun Feb 08, 2009 9:59 am
Here is what the diagnostic buffer tells us:
OB request error
No reveleance for user Z1(0000)
Cause: CYCLIC INTTERRUPT PULSE GENERATOR 6
Causing OB: OB35
Requested OB: OB80
This test is done with CPU 313C beacuse I dont have the 315 CPU right now because it hasnt arrived yet...
The interesting thing is if I dont be online in OB35 the CPU doesnt give SF I can be online in OB1 other FCs FBs no problem but not with OB35...
Thanks.
OB request error
No reveleance for user Z1(0000)
Cause: CYCLIC INTTERRUPT PULSE GENERATOR 6
Causing OB: OB35
Requested OB: OB80
This test is done with CPU 313C beacuse I dont have the 315 CPU right now because it hasnt arrived yet...
The interesting thing is if I dont be online in OB35 the CPU doesnt give SF I can be online in OB1 other FCs FBs no problem but not with OB35...
Thanks.
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- Posts: 7
- Joined: Sun Feb 08, 2009 9:59 am