回复内容:
对: pdengong 是求变化率的功能块。 内容的回复!
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感谢 我查到了英文版
• If the input variation is more than the rate trip limit in either direction, the rate of change of output is limited to the change specified by the rate trip limits. The output changes at the specified rate limits until the value is equal to the input variable. • PVROCBYPASSFL is provided in the function block to BYPASS the rate trip limit • If the rate limits are NaN, then limits are not applied and PV is set to P1. • This block provides a Bad PV alarm based on the status of the output • For an invalid input (=NaN), rate limiting is not done and the output is NaN. • ROC block allows you to configure individual values for the on-delay time and off-delay time for the individual alarms. A new parameter (xxxxALM.TMO) is introduced for individual alarms to configure the off-delay time. |