This depends on what the PLC's were called when the system was set up. For example I have a plc name "HMW_1" thenHMW_1:B13:0:10will be in PLC HMW_1 a digital input B13:0/10. HMW_1:F8:16 will be in PLC HMW_1 a float F8:16
This depends on what the PLC's were called when the system was set up. For example I have a plc name "HMW_1" thenHMW_1:B13:0:10will be in PLC HMW_1 a digital input B13:0/10. HMW_1:F8:16 will be in PLC HMW_1 a float F8:16
But of course that would be for SLC/5/500 type addressing, which is possible with a CLX but I'm presuming that the OP is using Native Tag addressing.
So the general format is PLC_Driver_IDLC_address. Consult the Help file for the Driver, open the Driver I/O configuration App to see the ID name of the driver.
If this is a new system, you'll have to define the Driver first.