<5. Functions>
160
IM 01E21A02-03EN
5.12 Write Lock Function
A write lock can be changed with two methods; the hardware write lock switch and parameter
settings for software write lock. When the write lock is enabled with either method, data cannot
be written. For details about the write lock switch, see the Installation Manual. This function can
be configured with the following parameters.
Display
Device setup ► Detailed setup ► Fieldbus info ► RB ► (see below)
F
OUNDATION
Fieldbus
Device Configuration ► RS ► Device Configuration ► Configuration ► (see below)
Block
Name
Relative
Index
Parameter
Description
Display
F
OUNDATION
Fieldbus
RB
18
--
Feature Info ► Feature
Selection
Sets the operation of the write
lock switch (see below).
RB
34
Write Lock
Write Lock Info ► Write Lock
Specifies the use of the
software write locking.
RB
92
--
Write Lock Info ► Write Lock
Level
Sets the operation of the target
range for the write locking (see
below).
Write Lock Level
If the write lock function is enabled, the parameter of the block for Write Lock Level cannot be
changed. Figure 5.12-1 shows correspondence between write lock level and target blocks for
write lock. Furthermore, WRITE_LOCK_LEVEL is set to “A(ALL FBAP)” (resource block, all
parameters of transducer block, and all parameters of the function block are write-protected) at
shipping from factory.
Figure 5.12-1 Correspondence between Write Lock Level and Target Blocks for Write Lock.
Selection
Target block for write lock function
F
OUNDATION
Fieldbus
Level:C (TB)
All parameters of transducer block, FEATURE_SEL and WRITE_LOCK_
LEVEL of resource block
Level:B (TB+RB)
Transducer block, all parameters of resource block
Level:A (All FBAP)
In addition to WRITE_CLCK_LEVEL"B(TB+RB)”, all parameters of function
block
Level:AA (MIB+All FBAP)
In addition to WRITE_LOCK_LEVEL"AA(MIB+ALL FBAP)”, MIB
Feature Selection
The user can choose to enable either the write lock function with the switch, or the software write
lock function. (See the table below.)