Panasonic IMAGECHECKER PV230 Manual page 84

Storing Character data in case of Outputting via PLC
communication
When "Protocol" has been set to "PLC Communication", 2 characters are stored in each data register
starting from the lower 8 bits of the specified data register.
Example)
Condition: No. of Output Characters = 5
Characters to be output: ABCDE
Start Register: 100
Output Result:
Register No. Higher 8 bits
100
101
102
82
Lower 8 bits
B A
D C
(Space) E