Mitsubishi Electric MELSEC FX3U Programming Manual page 468

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2) Timing chart (while M8027 is ON)
Drive input X000
Data Y007 to Y000
Strobe Y010
Execution flag Y011
Execution complete flag M8029
* If "H00 (NUL code)" is contained in the data (16 characters), the character just before "H00 (NUL code)"
is handled as the last character.
Related devices
Device
*1
M8027
*1. Cleared when the PR mode is changed from RUN to STOP.
Cautions
1. Command input and instruction operation
While the command input is ON: Even if the command input is continuously ON or if the pulse operation type
While the command input is OFF: All outputs are OFF.
2. Relationship with the scan time (operation cycle)
This instruction is executed in synchronization with the scan time.
If the scan time is short, the constant scan mode can be used. If the scan mode is too long, the timer interrupt
function can be used.
3. Output type of the PLC
Use a transistor output type PLC.
4. When "00H (NUL code)" is contained in the data (while M8027 is ON)
The instruction is executed completely, and the data after "00H" is not output.
M8029 remains ON during one operation cycle.
5. This instruction can only be executed twice in a program.
466
Operation is started when X000 turns ON from OFF.
Head
character
T T T
Name
OFF: 8-byte serial output (fixed to 8 characters)
PR mode
ON: 16-byte serial output (1 to 16 characters)
instruction is used, execution is completed after a series of outputs. M8029
turns ON only while M8027 is ON.
15 External FX I/O Device – FNC 70 to FNC 79
15.8 FNC 77 – PR / Print (ASCII Code)
Last
character*
T: Operation cycle
or interrupt time
Description