41
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.7 Types and Setting of Parameters
1
In
troduct
io
n
2
Ov
e
rv
ie
w
3
In
st
ru
ct
ion
Li
st
4
D
evi
ce
s
in
De
ta
il
5
Speci
fied t
h
e
D
evi
ce &
C
onst
a
nt
6
Bef
o
re
Pr
ogr
a
m
m
ing
7
Bas
ic
In
st
ru
cti
o
n
8
FNC0
0
-FNC0
9
P
ro
g
ra
m F
lo
w
9
FNC1
0
-FNC1
9
M
ov
e
&
C
om
par
e
10
FNC
20-
FNC
2
9
Ar
ith.
&
Logi
c
O
per
at
io
n
2. Entry code setting and access restriction
Caution on registering the entry code
• The entry codes are provided to restrict access from peripheral equipment to programs created by the
users. Keep the entry codes carefully.
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.
Setting status
Programming tool and access restriction
When both entry code and
second entry code are set
1) When a programming tool supports the second entry code
The programming tool performs the following operations in accordance with the
selected registration condition:
2) When a programming tool does not support the second entry code
All online operations are disabled. The entry code cannot be changed or reset, and the
PLC memory cannot be cleared.
When only entry code is set
1) In the case of 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) In the case of any programming tool other than FX-10P(-E)/FX-20P(-E)
Anti-plagiarism is set for all entry codes.
When both entry code and
second entry code are not set
All operations are enabled.
Registration condition
Program
Monitoring
Present value
change
Read
Write
Write prohibited
3
–
3
3
Read and write prohibited
–
–
3
3
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
–
–
–
–
Anti-plagiarism B
–
–
3
3
Erroneous
write prohibited
C
3
–
3
3