i have Citect Version V8.1 which has been communicating with a Bailey INFI 90 DCS via serial comms since 1995 without issue.
we recently upgrade the serial comms on the DCS to ethernet with a Rovisys OPC90 interface. all is working well except 1 faceplate which has many variables.
this faceplate takes approx 6 seconds to populate all the variables. i have approached Rovisys support and they seem to think its a citect issue.
OPC90 server looks to be communicating well to the Bailey DCS. citect as the OPC Client should read these variables in much faster than the serial link. the belwo is what Rovisys support has advised.
If Citect supports cached displays, verify the display is setup as a cached display. My suspicion is the 6 second delay isn’t related with getting values but rather with Citect setting up the OPC tags with OPC90 each time the display is called up. OPC90 is collecting the exception reported values for all the blocks in its database, regardless if those values are on display in Citect or not. If Citect supports definition of OPC tag group update time, verify the group update time for this display is not larger than 1000 ms.
are there any parameters i need to add to my .ini file to improve performance?
i see in the I/O device for Rovisys.OPC90Server that there is a field for Cache and update time, do i need to add some parameters to this ?
