| FB-Name | UA_SubscriptionProcessed |
| This Function Block is designed to be optionally called to check if monitored items have been published. The use of the function block depends on the underlying system – see notes. |
| VAR_INPUT |
| B | Execute | BOOL | FB operates on each call. |
| B | SubscriptionHdl | DWORD | Subscription handle. |
| B | Timeout | TIME | Time to response. |
| VAR_OUTPUT |
| B | Done | BOOL | FB has completed its task. |
| B | Busy | BOOL | The FB is not finished and new output values are to be expected. |
| B | Error | BOOL | Signals that an error has occurred within the FB. |
| B | ErrorID | DWORD | Error code. |
| B | Published | BOOL | Indicates, that variables have been published since the last call. |
| Notes: It is expected to use this call, if the underlying system WILL publish the values automatically. Shall not be used together with the function block UA_MonitoredItemOperateList. This call is expected to return with a valid result after it is called. See also 4.2 Monitored Items. |
