Mitsubishi Electric FR-A820-00046 Instruction Manual page 981

Parameters
● 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
– 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
b7 b6 b5 b4 b3 b2 b1 b0
0 0 0 1 0 0 1 0 1 0 1 0 1 0 1 1 1 1 0 0
M23
FR-A800
Number
Head Device
of
device code
devices
H0A H00 H00 H90 H05 H00 H10 H10 H10
device
H10 H00 H00
2 A B
b15 b14 b13 b12 b11 b10 b9 b8
to to
M16 M31 M24
Data
"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
First Device
of
code
devices
Data
H90 H02 H00 H12 HAB HCD H34
C D 3
b7 b6 b5 b4 b3 b2 b1 b0 b15 b14 b13 b12
1 1 0 1 0 0 1 1 0 1 0 0
to to
M39 M32 M47
Ethernet communication (FR-A800-E)
Data
4
b11 b10 b9 b8
0 = OFF
1 = ON
M40
5 - 779