Knick Stratos Multi E401N - PID Controller

Stratos Multi E401N
61
5.5.3 PID Controller
The PID controller can be configured as a pulse length or pulse frequency controller.
Controller Type Pulse length or pulse frequency controller; see below.
Controlled Variable Depending on the connected sensors.
Setpoint and
Neutral Zone
Input of setpoint and neutral zone in percent of the respective controller variable.
Pulse Period or
Maximum Pulse Frequency
0 ... 600 seconds or
0 ... 180 per minute
(P) Controller Gain Specified in percent
(I) Reset Time 0 ... 9999 seconds. 0 s = reset time (integral action) deactivated.
(D) Rate Time 0 ... 9999 seconds. 0 s = rate time (derivative action) deactivated.
Feed Time Alarm after 0 ... 9999 seconds
Behavior during HOLD Y = constant oder Y = 0%
Settings can be changed in the Relay Contacts submenu:
Parameter Setting

Inputs and Outputs

Relay Contacts

Controller
As soon as the “PID Linear” controller is selected, contacts K2 and K3 are occupied by the controller.
The corresponding settings are displayed in the
Controller Contacts K2/K3 submenu; see the table.
Pulse Length Controller
The pulse length controller is used to control a valve as an actuator. It switches the contact on for a
length of time depending on the controller output (Y). The cycle duration remains constant. The ON
time does not fall below the minimum of 0.5 s, even if the controller output assumes corresponding
values.
1_
0_
1_
0_
2
1
3
1 ON time (Y = 20%) 3 Pulse period
2 ON time (Y = 80%)