Function Description
The function block UA_SubscriptionProcessed can be optionally called to check if monitored items have been published. The use of the function block depends on the underlying system.
Representation in FBD
Parameter Description
Name |
Type |
Comment |
|---|---|---|
EXECUTE |
BOOL |
EF is activated continuously while the EXECUTE input is true. |
SUBSCRIPTIONHDL |
DWORD |
Subscription handle. |
TIMEOUT |
TIME |
Maximum time to response |
Name |
Type |
Comment |
|---|---|---|
DONE |
BOOL |
FB has successfully completed its task |
BUSY |
BOOL |
The FB is not finished and new output values are to be expected. NOTE: This
parameter can be raised even when this block is continuously executed.
|
ERROR |
BOOL |
Signals that an error has occurred within the FB. Set to true is either ErrorID or any of the NodeErrorIDs indicates an error. |
ERRORID |
DWORD |
|
PUBLISHED |
BOOL |
Indicates that variables have been published since the last call. At least one element of the array of ValuesChanged will be true. |
Use this function block when the underlying system will automatically publish the variable values. It is recommended that this function block not be used together with the UA_MonitoredItemOperateList function block.
Runtime Error
Refer to the Appendix for a list of OPC UA detected error codes.