WEG CFW501 V1.8X, Руководство по программированию, Страница: 169 / 192

HVAC Functions
CFW501 | 18-11
18
P1018 – Main PID Controller Operation Mode
Adjustable
Range:
0 = Always Automatic
1 = Always Manual
2 = Automatic or Manual selection via DIx and transition without
bumpless
3 = Automatic or Manual selection via Network and transition
without bumpless
4 = Automatic or Manual selection via DIx and transition with
bumpless
5 = Automatic or Manual selection via Network and transition
with bumpless
Factory
Setting:
0
Properties:
Access groups
via HMI:
HVAC
Description:
This parameter defines how the Main PID controller will work.
Table 18.5: Description of Main PID controller operation mode
P1018 Description
0 It defines the Main PID controller will be work always in automatic mode.
1 It defines the Main PID controller will be work always in manual mode.
2
It defines the digital input DIx programmed for Automatic / Manual will select the operation mode of Main PID
controller in automatic (0) or manual (1). It also defines the transition from automatic to manual or manual to automatic
will be done without bumpless.
3
It defines the bit 13 of serial control word (P0682) will select the operation mode of Main PID controller in automatic (0) or
manual (1). It also defines the transition from automatic to manual or manual to automatic will be done without bumpless.
4
It defines the digital input DIx programmed for Automatic / Manual will select the operation mode of Main PID
controller in automatic (0) or manual (1). It also defines the transition from automatic to manual or manual to automatic
will be done with bumpless.
5
It defines the bit 13 of serial control word (P0682) will select the operation mode of Main PID controller in automatic (0)
or manual (1). It also defines the transition from automatic to manual or manual to automatic will be done with bumpless.
NOTE!
Bumpless transfer is making the transition from Manual to Automatic Mode or Automatic to Manual
Mode without causing variation in the output of the PID controller. When the transition occurs from
Manual to Automatic Mode, the output value in Manual Mode is used to start the Integral portion
of the PID controller. This ensures that the output will start at this value.When the transition occurs
from Automatic to Manual Mode, the output value in Automatic Mode is used as the setpoint in
Manual Mode.