Mitsubishi Electric M800VW Series Manual page 237

M800V/M80V Series PLC Development Manual
5 Peripheral Development Environment (GX Works2)
5.12 File Password Function
 Work with a password-protected file
GX Works2
Password for unlock A
PLC parameters
PLC parameters
Sequence program A
Sequence program A
GX Works2
Temporary unlock not done (w/o password for
unlock) or not match registered password
Password for unlock B
Read from PLC
PLC parameters
Sequence program A
(1) To work with a password-protected file, temporarily unlock the file password.
A file password for unlock is set in GX Works2 when a file password is temporarily unlocked. A file password can be tem-
porarily unlocked only on the GX Works2 on which a password for unlock was set.
When GX Works2 on which a password for unlock was set is restarted, temporarily unlock a file password again. When
the file is worked with on GX Works2, a password for unlock is sent to the CNC.
The CNC verifies this password for unlock by comparing it with the registered password.
When the password is authenticated, the CNC executes the file operation.
Note
 Password setting is retained even after a password-protected file is overwritten.
(2) When temporary unlock of a file password is not done on the GX Works2, or when the password for unlock is different
from the previously registered password, password verification fails, and file operation is not executed.
IB-1501614-B
Matches registered
password
CNC
(1) Verify
Read from PLC
Write to PLC
(2) Verify
×
Prohibited
Write to PLC
212
RAM in the CNC
PLC parameters
PLC parameters
Sequence program A
Sequence program A
Password
Password A