Manual

EZwarePlus Programming Manual 69
1010-1015, Rev. 03
Pass-through mode
The pass-through mode allows serial communications from the PC to the PLC, though the HMI. This can
eliminate the need to disconnect the PLC from the HMI when it is necessary to configure the HMI.

 Pass-through mode is only available on HMIs with an Ethernet port. An Ethernet
connection from the PC to the HMI is required to initiate pass-through mode, even
when using serial pass-through mode.
To use the serial pass-through mode:
1. Select COM port. In the serial pass-through mode, data coming in on one serial port on the HMI is re-
transmitted out another serial port to the PLC.
2. HMI/IP: If the HMI has an Ethernet port, Utility Manager can query the HMI to get its communication
parameters through the Ethernet port. Specify the IP Address of the HMI that is to be used in pass-
through mode and click Get HMI Communication Parameters to read the current communication
settings for the HMI (if the HMI is connected directly to the PC’s Ethernet port, you must use a
crossover Ethernet cable).