power Posted February 1, 2006 Report Posted February 1, 2006 hi, i am dealing with the communication between twido and afcon pcim, is a scada software program, over opc server i have provided the communication and read the value which are in the plc on pc. i couldn not write anything to plc from pc and accordingly afcon. on the other hand in the opc client i have not any trouble like this . i think it is related with the afcon pcim but i could not found the solution yet. thank you for reading Quote
Spanner Posted February 1, 2006 Report Posted February 1, 2006 Most SCADA systems I've worked with have an option on the Tag configuration for selection between Read only and read/write. Seems simple enough but check this in the configuration of the Tag you want in Both the OPC server setup and the SCADA system Setup. Quote
Friday Posted February 7, 2006 Report Posted February 7, 2006 (edited) Hi, If you would like to control any outputs of PLC, you have to write ladder into that PLC first. For example. -----||------------(y0001) M0001 Create new OPC tag on OPC Server reffer to 'M0001' in PLC. Then you can use OPC Client to control 'M0001' cause 'y0001' to on or off. Edited February 7, 2006 by Friday Quote
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