Mitsubishi Electric CR800 Series Ethernet Function Instruction Manual page 79

When bit devices are handled in word units when performing data communication in binary code, a single device is
specified with a 1 bit as shown in the following example. Data is stored in the order from lower-order byte (bit 0 to bit 7) to
higher-order byte (bit 8 to bit 15).
Example
ON/OFF state of 32 devices starting from M16
When word devices are used, 1 word is specified in 16 bits as follows. Data is stored in the order from lower-order byte
(bit 0 to bit 7) to higher-order byte (bit 8 to bit 15).
When reading, do so after replacing values stored in the response data with higher/lower-order bytes at the user side.
When writing, store request data after replacing the values to be written with higher/lower-order bytes at the user side.
Example
Data stored in D350/D351
Stored values for
request or
response data
Values to be read
or written
Head Device
device code
The data in D350 is 56AB
(22187 in decimal).
"02" is shown for the number of devices because
the word device is specified in 16-bit units.
Number of
Data Data
devices
Number
Device
Head
code devices
device
The data in D351 is 170F
H
(5903 in decimal).
3 Description of functions
of
Data Data
H
3-53