7 Applied Instructions
7.8 External FX I/O Device
391
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
1
Outline
2
Instruction List
3
Configuration of
Instruction
4
How to Read
Explanation of
Instructions
5
Basic Instruction
6
Step Ladder
Instructions
7
Applied
Instructions
8
Interrupt Function
and Pulse Catch
Function
A
Relationships
between devices
and addresses
2. Timing chart
Type of output signal
• to +7 : Transmission output is the lower bit side, and +7 is the higher bit side.
• +8 : Strobe signal
• +9 : Execution busy flag Operation conforms to the timing chart above.
Extension function
1. 16-byte serial output
By ON/OFF control of special auxiliary relay M8027, the number of characters of output varies in every two
times of instruction drive. In the case of M8027=OFF, the operation is 8-byte serial output (fixed in 8
characters), and in the case of M8027=ON, it is 16-byte serial output (1 to 16 characters).
An example of display of 16 characters or less (1 character/byte) is explained by referring to a display device
(example: A6FD type external display unit
*1
).
The display data is supposed to be stored in hexadecimal code in D300 to D307, for example.
1) A6FD type external display unit
*1
connection example
The PLC shown below is an example of FX
2N-16EYT (sink output) connected to FX3U-32M.
*1. A6FD type external display unit is out of production since November 2002.
T0
T0
T0
T0: Scan time (ms)
ABCD H
Command input
+8 Strobe
+9 Execution busy flag
+1 +2 +3 +7
d
to +7 Data
d d
d
s1s1s1s1s1
AC100/200V
LG
Y031 Y032
24V
D 0 D 1 D 2 D 3 D 4 D 5 D 6 D 7
Y033
COM1
Y020 Y021 Y022 Y023 Y024 Y025 Y026 Y027
COM2
Y030
STR
A6FD type external display unit
*1
COM
12V
AC AC
NC
~
PLC
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