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minhdam06102

High speed counter

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Dear Mr/Ms, If we use Omron CP1E with 0.00; 0.01;0.02 for high speed. Example 0.00 is 0.02ms/pulse and with heavy program need 1.2ms/duty so that 0.00 can read input with pulse 0.03ms or not? Please help me to slove this. Thanks & best regards,

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If you are using a high speed counter, then this is ok. If you need to recognise a 20us pulse as an input then even using the quick response input only allows 50us. Can you explain further your intentions? Pp

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Dear Mr/Ms Sparky, If I want to use Omron CP1H without any high speed counter module, just only using high speed input that have compact on CP1H for high speed pulse. For example, Input 00.00 recognize pulse not less than 0.2us, with input from instrument with pulse 0.1ms this mean in normal condition 0.00 can read that pulse. But if we have program with 9000 network , then PLC will read program from network 0 to 9000 need 10ms. So I don't now PLC can read pulse 0.1ms or not? Please help me to solve this problem. Thanks & best regards,

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Can you confirm the times? You have mentioned 0.2us and 0.1ms. If it's 0.2us, then the CP1E is not going to work. Options: 1. Use the CP1E's quick response interrupt. This will recognise a 50us signal and capture it until the next I/O refresh. It is available on inputs 0.2 to 0.7 No programming is required (just 'Settings') If there are two signals within one scan, it won't recognise the second. 2. Declare the input as an interrupt. The interrupt will respond to a 50us signal. This will call an interrupt task. This means you need to write some code, BUT you can handle multiple signals within one scan. Pp

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Dear Mr Sparky, Thanks For your helps. So that mean PLC pulse input will not be affect by duty of program from ladder 0 to ladder n, is it. Best regards,

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No, not if you use quick response inputs or interrupt inputs.

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Dear Mr Sparky, But CP1E and CP1H may be not support interrupt INT. How can we program it? Thanks & best regards,

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Yes they can. See the User's manual from this link Pp

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Dear Mr Sparky, Thanks for your help. I see some structure so i will try it. Best regards,

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