7 Special functions
current
t1
t2
t1
Lim
t2
Lim
I
2
t
I
2
t
t
Maximum
current
Nominal
current
In the first section, t1, the current value is higher than the rated current. At time t1
Lim
, I
2
t
Lim
is reached and
the current is limited to the rated current. A current that corresponds to the maximum current then occurs for
a period of time t2. Hence, the value for I
2
t
Lim
is reached more quickly than in time t1.
7.3 Saving objects
Note
Improper use of the function can result in it no longer being possible to start the controller. Therefore,
carefully read the entire chapter before using the function.
Note
Objects can be permanently saved via configuration file
pd4cfg.txt
cfg.txt
. The save
mechanism described in this chapter can, with this controller, only be used with a NanoJ program or
with the Plug & Drive Studio software.
7.3.1 General
Many objects in the object dictionary can be saved and then automatically reloaded the next time the
controller is switched on or reset. Furthermore, the saved values are also retained following a firmware
update.
Only entire collections of objects (referred to in the following as categories) can be saved together; individual
objects cannot be saved.
An object can be assigned one of the following categories:
●
Communication: Parameters related to external interfaces, such as PDO configuration etc.
●
Application: Parameters related to operating modes.
●
Customer: Parameters that are written and read by the customer/user only and are ignored by the
controller firmware.
●
Drive: Parameters related to the motor and the sensors (BLDC/Stepper, Closed/Open Loop…). Some are
set and saved by auto setup.
Version: 2.0.1 / FIR-v1650
89
