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2-4 Constant Initialization and Write-protection
2-4-1 Constant Initialization
This operation returns the values of all constants to their original
factory settings. To initialize constants, write 8 to constant No. 00.
Description Key Operation Digital Operator Display
Select PRGM Mode.
Select constant (No. 00).
Constant (No. 00) is displayed.
Change the set value.
PRGM
ENTER
DATA
ENTER
RESET
DATA
ENTER
See note 1
See note 2
Note 1. Differs according to the setting data before changing.
2. The display returns to 01 after write-in. This indicates that ini-
tialization is executed at writing-in the data.
2-4-2 Constant Write-protection
When constant no. 00 is set to 0, the settings in constants no. 01 to
19 can be read, but no constants (except no. 00) can be overwrit-
ten. The procedure below sets the value of constant no. 00 to 0.
Description Key Operation Digital Operator Display
Select PRGM Mode.
Select constant (No. 00).
Constant (No. 00) is displayed.
Change the set value.
PRGM
ENTER
DATA
ENTER
RESET
DATA
ENTER
See note
Note Differs according to setting data before changing.
The following table shows the levels of access for constant no. 00
values of 0 to 3.
Constant no. 00 value Readable constants Writeable constants
0 (write-protect setting) No. 00 to 19 No. 00 only
1 (initial setting) No. 00 to 19 No. 00 to 19
2 No. 00 to 29 No. 00 to 29
3 No. 00 to 59 No. 00 to 59
5 No. 00 to 69 No. 00 to 69
Constant Initialization and Write-protection Section 2-4
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