Ad51 And Pc Cpu Reset - Mitsubishi Melsec A User Manual

6. AD51 PROGRAMMING NOTES
/MELSEC
6.4 AD51 and PC CPU Reset
The following explains the effects of resetting the AD51 and the PC
CPU.
(1) AD51 reset operation
1) The AD51 processes i t s programs as though the power has
been switched on.
With multi task start already set
. . . .
.Executes multi task.
Without multi task start
. . . . . . . . . .
.Displays the mode se-
lect menu on the con-
sole.
2) All the AD51 general-purpose inputs are switched off.
3)
During reset, there is no accessing of the PC CPU.
4)
There is no signal by which the PC CPU can know that the
AD51 has been reset.
5) Any FROM or TO instructions executed by the PC CPU
when the AD51 is reset will be invalidated.
(2) PC CPU reset operation
1) All the AD51 general-purpose.outputs are switched off.
2) Resetting the PC CPU disables access by the AD51 E t o the
PC CPU for about five seconds after the PC CPU is set t o
RUN. I f the PC CPU is accessed during this period, "PC
DOWN ERROR" or "TIME OUT ERROR" is detected.