The following limitations of the SINUMERIK Connector application have to be considered:
Limited support of SINUMERIK ONE with the following technical restrictions
Full support of SINUMERIK ONE GIV up to V6.23 (for 6.24 and newer the HF_Probe will not work)
PLC password protection (aka PLC Access Level; PAL) must be deactivated in the TIA Portal project for HMI access
If the HMI would need a password to access PLC data, the SINUMERIK Connector will not be able to connect to the controller.
Data_Events and HF data do not use same time source. Therefore, timestamps can be different. Subscribe to the CYCLE and SYNC_CYCLE_HF to be able to synchronize the data based on the CycleCounter.
According to the General Payload Specification, CYCLE is used as STRING on IE Databus even when we push it as DT_UINT64. Relevant for consumer app.
For more information, refer to the IE Databus Reference document.
Data Event subscription like '/channel/parameter/r[u1,1,#2]' with array length greater 1 will not work. Relevant for the consumer app. To solve this, add 2 data events like '/channel/parameter/r[u1,1,#1]' and '/channel/parameter/r[u1,2,#1]'.
The same restriction applies to Low Frequency data subscriptions.
A subscription to a data event is only sending any value if the value changes on the data source. The initial value is not sent to the subscription.
If the IED is under high load SINUMERIK Connector may drop data which is not processed by the client application(s) fast enough, to avoid internal buffer overflow.
If the configuration of the SINUMERIK Connector is changed using the IEM functionality "Update configuration" instead of using the Common Configurator, it is necessary to restart the SINUMERIK Connector application manually to activate the new configuration.
SINUMERIK user variables may not be available after NCU reboot and will therefore be removed from metadata and marked as not available. This can happen if the SINUMERIK is not ready loading all variables until the SINUMERIK Connector is validating the configured datapoints.
8-Bit and 16-Bit datatypes will always be delivered as 32-Bit datatype.