BMX ERT 1604 T Clock
To set the clock type, in Control Expert select the module tab by double-clicking the BMX ERT 1604 T module in the drop.
BMX ERT 1604 T module can be in a local drop or in a Modicon X80 drop as shown in the following figure:

Select the clock type by setting the
value:
The allowed clock sources are:
(preferred clock source for system time stamping)