MOV vs COP instructions

Can someone tell me the difference between these two instructions and where you would apply one vs the other?

Thanks

MOV copies just one word of data and converts between data types. eg, a DINT 100 moved to a REAL is converted to 100.0

COP copies multiple words of data and performs and exact bitwise copy of the data. Since there is no data type conversion a DINT 100 COPied to a REAL becomes 1.4012985e-43 (Which can be very useful)

In Allen Bradley a MOV interprets the source as a numeric value then sets that numeric value into the destination. If it is a float to an integer it will truncate the value.

A COP copies the bit pattern of the source into the storage space of the target without any attempt to interpret it as a value. So COPying between different types can be risky if you don't know what you are doing.