Mitsubishi Electric 700 Series Programming Manual page 146

CAUTION
The comparison instruction regards the specified data as BIN values. Hence, if the value
whose most significant bit (b15) is 1 (8 to F) is specified for comparison of hexadecimal
data, it is regarded as a negative BIN value.
Example
Comparison of 4-digit HEX values
Regarded Regarded
as 1384
as -32767
in BIN. in BIN.
Therefore, the result is -32767 < 1384 and Y10 does not turn on.
Basic Instructions
141
3