tag:blogger.com,1999:blog-2987825281439878327.post2599066788096644266..comments2022-03-25T09:49:59.292+00:00Comments on ISA S88 Control: S88 GraphicsUnknownnoreply@blogger.comBlogger2125tag:blogger.com,1999:blog-2987825281439878327.post-18391962886197216302012-01-19T20:31:10.996+00:002012-01-19T20:31:10.996+00:00Actually, the status of an equipment module can re...Actually, the status of an equipment module can reflect manual operation.<br /><br /><br />With this system, Manual Operation is actually simpler for the operator, and more reliable<br />Just letting the operator take direct control of the control modules (valves for example) by allowing operators to set them to manual and then drive them potentially allows the operator to put equipment into undefined states, with unknown consequences.<br />Instead the operator can put the entire Equipment Module (or maybe Unit) into manual and then set it to a predefined state such as filling, emptying etc. <br />And as such states are known in advance the system can still be programmed so that the equipment responds coherently.<br />*Yes, of course you can also allow more direct manual operation. So that level of manual should be discouraged, perhaps by a higher level than normal operator security setting.Francishttps://www.blogger.com/profile/00633291485380602383noreply@blogger.comtag:blogger.com,1999:blog-2987825281439878327.post-10835938753119284142012-01-08T22:13:52.018+00:002012-01-08T22:13:52.018+00:00Can you tell us how the operators like this?
1) I...Can you tell us how the operators like this?<br /><br />1) It seems like it would take a long time to "drill down" to whatever you want to look at.<br />2) Manual operation of the plant would be impossible from a practical perspective. I assume the status of an equipment module doesn't reflect manual operation.Anonymousnoreply@blogger.com