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“B” Group: Fine-Tuning Functions
Configuring Drive
Parameters
3–36
Software Lock
Mode
The software lock function keeps personnel from accidentally changing parameters in the
inverter memory. Use B031 to select from various protection levels.
The table below lists all combinations of B031 option codes and the
ON/OFF state of the [SFT] input. Each Check ✔ or Ex ✘ indicates
whether the corresponding parameter(s) can be edited. The Standard
Parameters column below lists Low and High level access for some
lock modes. These refer to the parameter tables throughout this
chapter, each of which includes a column titled Run Mode Edit as
shown to the right. The two marks (Check ✔ or Ex ✘) under the “Lo
Hi” subtitle indicate whether Low-level and/or High-level access
applies to each parameter as defined in the table below. In some lock modes, you can edit only
F001 and the Multi-speed parameter group that includes A020, A220, A320, A021–A035, and
A038 (Jog). However, it does not include A019, Multi-speed operation selection. The editing
access to B031 itself is unique, and is specified in the right-most two columns below.
NOTE: Since the software lock function B031 is always accessible when the motor is stopped,
this feature is not the same as password protection used in other industrial control devices.
NOTE: To disable parameter editing when using B031 lock modes 00 and 01, assign the [SFT]
function to one of the intelligent input terminals. See “Software Lock” on page 4–25.
B031
Lock
Mode
[SFT]
Intelligent
Input
Standard Parameters
F001 and
Multi-speed
B031
Stop Run Stop or Run Stop Run
00 OFF ✔ Low-level ✔✔✘
ON ✘✘ ✘ ✔✘
01 OFF ✔ Low-level ✔✔✘
ON ✘✘ ✔ ✔✘
02 (ignored) ✘✘ ✘ ✔✘
03 (ignored) ✘✘ ✔ ✔✘
10 (ignored) ✔ High-level ✔✔✔
Run
Mode
Edit
Lo Hi
✘ ✔
“B” Function
Run
Mode
Edit
Lo Hi
Defaults
Units
SRW Display
Func.
Code
Name Description
–FE
(CE)
–FU
(UL)
–F
(Jpn)
B031 Software lock mode
selection
Prevents parameter changes
in five options:
00 Low-level access, [SFT]
input blocks all edits
01 Low-level access, [SFT]
input blocks edits
(except F001 and Multi-
speed parameters)
02 No access to edits
03 No access to edits except
F001 and Multi-speed
parameters
10 High-level access,
including B031
✘ ✔ 01 01 01 —
>b031 S-LOCK
Mode MD1