Test Of Word Device (Wt Command) - Mitsubishi Electric MELSEC FX Series User Manual

FX communication
8.6

Test of Word Device (WT command)

1 ) Command specification
Protocol format 1 is shown.
Test command
(selective write,word)
Computer
Programmable
controller
Notes
• Specify the range and number of devices (16 bit words) so as to satisfy the following
conditions.
- 1
• The station number, PC (PLC) number, number of devices, and sum check code are
expressed in hexadecimal.
• C200 to C255 (CN200 to CN255) which are 32-bit devices cannot be handled in this
command.
2 ) Specification example
To changing the present value of D500 to 1234H, bits Y100 to Y117 to BCA9H, and the
present value of C100 to 100 at station No.5 (with message wait time set to 0 ms).
E
N 0 5 F F
Q
Computer
30H 35H 46H
05H
Programmable
controller
Indicates to change the
contents of D500 to
1234H or 4660 in
decimal.
Number of
devices
(2 characters,
hexadecimal)
When specifying bit
devices,specify the Head
device.
≤ ≤
number of devices
The sum check is calculated over this range
W T 0 0 3 D 0 5 0 0
46H 57H 54H 30H 30H 33H 44H 30H 35H 30H 30H 31H
1 0 1
Y
1
1
7
Each bit 0/1 indicates reset (OFF) or set (ON) respectivly.
Character area C
Device Device
(5 characters) (4 characters)
One word device requires four hexadecimal
digits.
Therefore,one word is expressed using four
characters.
10 (6 for FX )(one unit is 16 points for bit devices)
0N
1 2 3 4 Y 0 1 0 0 B C A 9
32H 33H 34H 59H 30H 31H 30H 30H 42H 43H 41H
B C A
1 1 1 0 0 1 0 1 0 1
Y Y Y Y Y Y Y Y Y Y Y Y
1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 0 0 0 0 0
6 5 4 3 2 1 0 7 6 5 4 3
Device Device
(5 characters) (4 characters)
C N 1 0 0 0 0 6 4 0 7
39H 43H 4EH 31H 30H 30H 30H 30H 36H 34H 30H 37H
9
Indicates to change the
0 0 1
present value of C100 to
Y Y Y
64H or 100 in decimal.
1 1 1
0 0 0
2 1 0
Commands 8
8
A
C 0 5 F F
K
30H 30H 46H 46H
06H
8-9