Pid Controller 2; Basic Settings; Pump And Fan Cascade Function - Honeywell HVAC400x Applications Manual

HVAC400X – APPLICATION MANUAL
soft fill function is set to 'Enabled, Timeout', the drive operates at the soft fill frequency until the time set by this
parameter expires.
If you selected the option Enabled (Timeout) in parameter P3.13.7.1 Soft Fill Function, parameter Soft Fill Timeout
gives the quantity of time that the drive operates at the constant soft fill frequency (P3.13.7.2 Soft Fill Frequency)
before the PID controller starts the regulation.
10.14

PID controller 2

NOTE: See 10.13 PID Controller 1 for other PID controller parameters.
10.14.1

Basic Settings

P3.14.1.1 ENABLE PID (ID 1630)
You can use this parameter to enable the PID controller.
NOTE: This controller is for external use only. It can be used with an analog output.
P3.14.1.2 OUTPUT IN STOP (ID 1100)
You can use this parameter to set the output value of the PID controller as a percentage of its maximum output
value when it is stopped from a digital output.
10.15

Pump and Fan Cascade Function

The Pump and Fan Cascade function lets you control a maximum of four motors, pumps, or fans with the PID
controller.
The HVAC drive is connected to a motor, which is the regulating motor. The regulating motor connects and
disconnects the other motors to/from the mains with relays. This is done to keep the right setpoint. The Autochange
function controls the sequence in which the motors start to make sure that they wear equally. You can include the
regulating motor in the autochange and interlock logic, or set it to always be Motor 1. It is possible to remove
motors momentarily with the Interlock function, for example for maintenance.
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