YOKOGAWA FA-M3V e-RT3 Plus, Hardware Manual

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A4-3
IM 34M06C11-01E
A4.3 Self-diagnostic Functions
A4.3.1 CPU Module Operation at Power-on
Figure A4.2 shows the flowchart of CPU module operation at power-on time.
Initialize hardware
Self-diagnostics
Check input/output
configuration
Initialize system
tables
Create input/output
module configuration
table
Turn on ERR LED
Set RDY flag
Turn on RDY LED
Read program
from ROM
Diagnose program
Turn ON ERR LED
Turn ON ERR LED
Diagnose program
Read program
from ROM
Copy input/output module
configuration table to local
CPU memory
Turn on ERR LED
Set RDY flag
Turn on RDY LED
Initialize system
tables
Self-diagnostics
Initialize hardware
OK?
OK?
ROM
writer mode?
ROM
cassette
installed?
Program
in memory?
OK?
Program
control?
Which is set,
RUN or STOP?
Which is set,
RUN or STOP?
Program
control?
OK?
Program
in memory?
ROM
cassette
installed?
ROM
writer mode?
CPU module
ready?
OK?
CPU module CPU module
N
N
Y
Y
RUN
STOP
Y
Y
Y
Y
Y
Y
N
N
N
N
N
Y
N
N
N
N
N
N
STOP
Y
Y
Y
N
Y
Y
Y
Y
N
N
RUN
Sequence
CPU module ?
Sequence
CPU module ?
FA040301.VSD
Add-on CPU modules
(installed in slots 2-4) Main CPU module
(installed in slot 1)
Stop
Wait for command
Wait until program
is loaded
Start program
Stop
Stop
Monitor
Read
Stop
Wait for command
Wait until program
is loaded
Stop
Stop
Start program
RAM check
Check the slot and number
of the CPU and expansion
modules
Figure A4.2 CPU Module Operation Flowchart (for CPU modules other than F3SP66-4S,
F3SP67-6S, F3SP71-4N/4S and F3SP76-7N/7S)