Hi all, till now we always created the PlcFieldHandler and PlcValueHandlers in the Driver code statically.
Now with the updated ADS driver we have some completely new possibilities: * We can check if a tag exists before executing the query * We can check the type and structure of values we want to write before sending them to the PLC * We can start using some fancy array notation which we can validate the query before sending the request. The only problem I currently have, it that the FieldHandler and ValueHandler are both created detached from the Connection, where the information is present. So, I would like to change that the Connection is responsible of creating the PlcValueHandler and PlcValueHandler. With this we could even do crazy stuff like: * In S7 give an error warning if the type of S7 doesn’t support the datatype, that the user wanted to use? * Possibly rewrite fields, if we’re using an incompatible S7 type (Like if I’m on a S7-1200 and want to read a LINT, which the 1200 doesn’t support), then we could replace this with a 2-element array of DINT and still support datatypes the device itself doesn’t. * We could provide an error if someone wants to use the S7 driver subscription API with a PLC, that doesn’t support that. * … I probably could go on forever ;-) What do you folks think? Chris
