Brainchild C21 User Manual page 7

Programming Port Programming Port
A programming port is used to connect the unit to a hand-held
programmer or a PC for quick configuration, also can be connected
to an ATE system for automatic testing & calibration.
Auto-tune
The auto-tune function allows the user to simplify initial setup for a
new system. A clever algorithm is provided to obtain an optimal set
of control parameters for the process, and it can be applied either as
the process is warming up ( cold start ) or as the process has been
in steady state ( warm start ).
Lockout Protection Lockout Protection
According to actual security requirement, one of four lockout levels
can be selected to prevent the unit from being changed abnormally.
Bumpless Transfer Bumpless Transfer
Bumpless transfer allows the controller to continue to control by
using its previous value as the sensor breaks. Hence, the process
can be well controlled temporarily as if the sensor is normal.
Soft-start Ramp Soft-start Ramp
The ramping function is performed during power up as well as any
time the set point is changed. It can be ramping up or ramping
down. The process value will reach the set point with a predetermined
constant rate.
Digital Filter Digital Filter
A first order low pass filter with a programmable time constant is used
to improve the stability of process value. This is particularly useful in
certain application where the process value is too unstable to be read.
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