Mitsubishi Electric 800 Series Instruction Manual page 95

• Read data / write data
The value read from the device is stored for reading. The value to be written to the device is stored for writing.
The data is arranged differently between reading/writing in bit units (subcommand: H0001) and reading/writing in word
units (subcommand: H0000).
• In bit units (subcommand: H0001)
Each device is specified in 4 bits. The data is sent from the upper bit for the device with the first device No. and the
subsequent devices in order. The ON state is denoted as 1 and the OFF state is denoted as 0.
(Example) ON/OFF state of five devices starting from M10
Head Device
device code
H0A H00 H00 H90
• In word units (subcommand: H0000)
When bit devices are used as word data, each device is specified in one bit. The data is stored from the lower byte (bit
0 to bit 7) to the upper byte (bit 8 to bit 15).
(Example) ON/OFF state of 32 devices starting from M16
1 2
b7 b6 b5 b4 b3 b2 b1 b0 b15 b14 b13 b12
0 0 0 1 0 0 1 0 1 0 1 0 1 0 1 1 1 1 0 0
M23 to M16
When word devices are used, one word is specified in 16 bits as follows. The data is stored from the lower byte (bit 0 to
bit 7) to the upper byte (bit 8 to bit 15).
The user should switch the values in the upper and lower bytes in the response data for reading.
The user should switch the write values in the upper and lower bytes to store them in the request data for writing.
(Example) Data stored in D50/D51
94
2. Ethernet Communication
2.10 SLMP
Number
of
devices Data
H05 H00 H10 H10 H10
First Device
device code
H10 H00 H00 H90
A B C
b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
1 1 0 1 0 0 1 1 0 1 0 0
M31 to M24 M39 to
"0" is shown when the number
of points is an odd number.
M14 ON
M13 OFF
M12 ON
M11 OFF
M10 ON
"02" is shown for the number of devices because the
word device is specified in 16-bit units.
Number
of
devices
Data Data
H02 H00 H12 HAB HCD H34
D 3 4
b15 b14 b13 b12 b11 b10 b9 b8
M32 M47 to M40
0 OFF
1 ON