Passwords For Plc Data; Passwords For Plc Data Files - Mitsubishi Electric M800VW Series Manual

M800V/M80V Series PLC Development Manual
6 Explanation of Built-in Editing Function (PLC On-board)
6.6 PLC Data

6.6.3 Passwords for PLC Data

Passwords are set on some PLC data to protect PLC data.
Password that can be used with PLC on-board are as follows:
Password type
File password For each file
 Program
 PLC Messages
 Device comments
Block password For each POU
 Program block
 Function block
(*1) Usable symbols
! " # $ % &' ( ) * + , - . / : ; < = > ? @ [ \ ] ~
Do not use the symbols "@", "^", "」 「 `", and "」 「|" because they may not be input with PLC on-board although they can
be used with GX Works2.

6.6.3.1 Passwords for PLC Data Files

A file password is set for each file in PLC data.
A file password for PLC data stored in the NC can be temporarily cleared by the PLC on-board.
Note
(1) PLC on-board cannot be used to register, change, or delete file passwords.
Use GX Developer (for a project created with GX Developer or PLC on-board) or GX Works2 (for a project created with
GX Works2) to operate.
Refer to "5.12 File Password Function" for GX Works2.
File password attributes
File passwords have write attributes (writes allowed/not allowed) and read attributes (reads allowed/not allowed). The
following table describes the operation restrictions corresponding to these attributes.
Attribute
Writes not allowed
Reads and writes not allowed
IB-1501614-B
Target Attribute
Writes not al-
lowed
Reads and writes
not allowed
Read and writes
not allowed
Restricted operation
PLC data cannot be overwritten, deleted or changed after editing circuits.
In addition to the preceding restrictions, PLC data cannot be read or viewed.
Number of Character that can be
characters set
4 One-byte numeric
character
One-byte numeric
character (uppercase)
One-byte numeric
character (lowercase)
6 to 32 One-byte numeric
character
One-byte numeric
character (uppercase)
One-byte numeric
character (lowercase)
Half-width space
One-byte symbols(*1)
304
Reference
6.6.3.1 Passwords for PLC
Data Files
6.6.3.2 Block Passwords
for PLC Data