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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.7 Types and Setting of Parameters
1
Introduction
2
Overview
3
Instruction
List
4
Devices
in Detail
5
Specified the
Device &
Constant
6
Before
Programming
7
Basic
Instruction
8
FNC00-FNC09
Program Flow
9
FNC10-FNC19
Move & Compare
10
FNC20-FNC29
Arith. & Logic
Operation
3. Entry code setting and access restriction
Caution on selecting the permanent PLC lock
• Once the permanent PLC lock is set, it cannot be reset.
To reset the permanent PLC lock or write programs again to the PLC, all-clear the PLC memory.
Caution on registering the entry code
• The entry codes are provided to restrict access from peripheral equipment to programs created by the user. Take
care to save/remember the entry codes.
If a registered entry code is forgotten, the online operations from the programming tool to the PLC are disabled
depending on the programming tool type and the contents of the registered entry code.
• In an FX
3U/FX3UC PLC whose version is earlier than Ver. 2.61, do not use a memory cassette where the customer
keyword and permanent PLC lock are set.
If a memory cassette where the permanent PLC lock is set is used in an FX
3U/FX3UC PLC whose version is earlier
than Ver. 2.61, the PLC does not function normally.
If the PLC memory is cleared or the keyword is canceled in an FX
3U/FX3UC PLC whose version is earlier than Ver.
2.61 for a memory cassette where the customer keyword and permanent PLC lock are set, access restrictions set
by the keyword may not be able to be removed normally.
Setting status Peripheral equipment and access restriction
When the permanent PLC lock is
selected
The programming tool performs the following operations in accordance with the selected registration
condition:
Once the permanent PLC lock is set, it cannot be reset.
To reset the permanent PLC lock or write programs again to the PLC, all-clear the PLC memory.
When the customer keyword is set
The programming tool performs the following operations in accordance with the selected registration
condition:
It is not possible to cancel the entry code using the customer keyword.
When both the entry code and
second entry code are set
The programming tool performs the following operations in accordance with the selected registration
condition:
When only the entry code is set
1) When using handy programming panel FX-10P(-E)/FX-20P(-E)
The programming tool performs the following operations in accordance with the head character
of the entry code (in 8 characters):
2)
When using any programming tool, data access unit or GOT other than the FX-10P(-E)/FX-20P(-E)
Read/Incorrect write protection is set for all entry codes.
When no entry code is set All operations are enabled.
Registration condition
Program
Monitoring
Present value
change
Read Write
Write prohibited 3 – 33
Read and write prohibited – – 33
All online operations prohibited
–– – –
Registration condition
Program
Monitoring
Present value
change
Read Write
Write prohibited 3 – 33
Read and write prohibited – – 33
All online operations prohibited
–– – –
Registration condition
Program
Monitoring
Present value
change
Read Write
Write prohibited 3 – 33
Read and write prohibited – – 33
All online operations prohibited
–– – –
Head character
of entry code
Program
Monitoring
Present value
change
Read Write
All operations
prohibited
A,D to F,0 to 9 – – – –
Read/Incorrect
write protection
B––33
Erroneous write
prohibited
C 3 – 33