Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

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Parameters Ethernet communication (FR-A800-E)
FR-A800 5 - 779
●
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.
– 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 five devices starting from M10
Example ON/OFF state of 32 devices starting from M16
H0A H00 H00 H90 H05 H00 H10 H10 H10
Head
device
Device
code
Number
of
devices
Data
"0" is shown when the number of
points is an odd number.
M14 = ON
M13 = OFF
M12 = ON
M11 = OFF
M10 = ON
H10 H00 H00 H90 H02 H00 H12 HAB HCD H34
0 0 0 1 0 0 1 0 1 0 1 0 1 0 1 1 1 1 0 0
b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
1 1 0 1 0 0 1 1 0 1 0 0
b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 b15 b14 b13 b12 b11 b10 b15 b14 b13 b12
1 2 A B C D 3 4
M23 M16 M31 M24 M39 M32 M47 M40
First
device
Device
code
Number
of
devices
Data
"02" is shown for the number of devices because the word
device is specified in 16-bit units.
0 = OFF
1 = ON
to to to to
Data