Experimental Physics and
Industrial Control System

      I meet some problem while using CSS. The problem is when I use PVUtil.getDouble() to get the value of some PV, there will be ERROR in BOY console if the PV is disconnected. An example ERROR information is "2014-05-04 17:12:48 ERROR: Error exists in script/CSS/_javascript_/ECR_Print.js Wrapped java.lang.RuntimeException: PV SSC-LINAC:ECR:AGL-BEAM has no value. (script#23)". How can I check the connecting state in _javascript_ code before I use PVUtil.getDouble()?

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 岳 敏 Min Yue

Institute of Modern Physics, Chinese Academy of Sciences
509 Nanchang Road, Lanzhou, 730000, P.R.China

Tel:+86-0931-4969469

Handy: +86-18509316383

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