ABB ACS355 series, Руководство пользователя

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Program features 151
Supervisions
The drive monitors whether certain user selectable variables are within the user-
defined limits. The user may set limits for speed, current etc. The supervision status
can be indicated through relay or digital output.
The supervision functions operate on a 2 ms time level.

Settings
Parameter group 32 SUPERVISION

Diagnostics
Parameter lock
The user can prevent parameter adjustment by activating the parameter lock.

Settings
Parameters 1602 PARAMETER LOCK and 1603 PASS CODE
PID control
There are two built-in PID controllers in the drive:
• Process PID (PID1) and
• External/Trim PID (PID2).
The PID controller can be used when the motor speed needs to be controlled based
on process variables such as pressure, flow or temperature.
When the PID control is activated, a process reference (setpoint) is connected to the
drive instead of a speed reference. An actual value (process feedback) is also
brought back to the drive. The drive compares the reference and the actual values,
and automatically adjusts the drive speed in order to keep the measured process
quantity (actual value) at the desired level (reference).
The control operates on a 2 ms time level.
Actual signal Additional information
1401 Supervision status through RO 1
1402 / 1403 / 1410 Supervision status through RO 2…4. With option
MREL-01 only.
1805 Supervision status through DO
8425 , 8426 / 8435 , 8436 /…/ 8495 ,
8496
Sequence programming state change according to
supervision functions