3. - Fagor Automation

9.3.1 Monitoring with the PLC in operation and with the PLC stopped
It must be borne in mind that the CNC initializes all physical outputs and the PLC resources on powerup,
after the key sequence [SHIFT]+[RESET] and after detecting a watchdog error at the PLC.
The initialization process sets all resources to "0" except those active low. They will be set to "1".
During the monitoring of the PLC program and the various PLC resources, the CNC will always show
the real values of the resources.
If the PLC is on, note that a program cycle is processed in the following way:
The PLC updates the real input values after reading the physical inputs (from the electrical
cabinet).
It updates the values of resources M5000 thru M5957 and R500 thru R559 with the values of
the CNC logic outputs (internal variables).
It runs the program cycle.
It updates the CNC logic inputs (internal variables) with the real values of resources M5000 thru
M5957 and R500 thru R559.
It assigns to the physical outputs (electrical cabinet) the real values of the corresponding "O"
resources.
It copies the real values of resources I, O, M into their own images.
Physical inputs Real inputs
Logic CNC outputs M5500 - M5957
R550 - R562
CY1
END
Yes
Is it the first time and
is there a CY1?
No
M5000 - M5465
R500 - R505
PRG
END
Real outputs Physical outputs
Real values
I1 - I256
O1 - O256
M1 - M2047
Logic CNC inputs.
Image values
I1 - I256
O1 - O256
M1 - M2047
Operating manual
PLC
Monitoring 9.
CNC 8035
·T· MODEL
(SOFT V16.3X)
·167·