Elimko E-PR-110 Series, Руководство пользователя

Страница: 43 / 62

83 82
6.12 - PID 6.12 - PID
Cycle Time:
Control Form:
Proportional Band:
Integral Time:
Derivative Time:
Set Source:
Manual Reset:
Proportional band of PID loop in engineering unit.
PID loop integral time in seconds. 0 value of integral time disables
integration.
PID loop derivative time in seconds. 0 value of derivative time
disables derivation.
Please see parameter. Set Type
Output value corresponding to zero error signal(PV-Set). %50 is
recommended if there is no priory information.
Cycle time determines the PID PWM ouput period and is only applied
to the digital outputs and is entered in seconds. Short values of cycle
times result more precisional and accurate contol but may cause
the control element (actuator) wear faster than would be with long
cycle times.
Determines the control form of PID output. output form
makes the control output increase when the error signal (PV – Set)
increases, conversely
selection makes the control output
decreases when the error signal increases. When deciding the control
form of PID Loop, how the control output will affect the process
variable should be in mind. For instance cooling outputs causes a
reverse reaction of temperature output.
REVERSE
FORWARD
Name:
Input Source:
Set Type:
Description:
Min. Set:
Min. Out:
Max. Set:
Max. Out:
PID Source:
PID Source to be configured.
Maximum 12 characters can be entered.
Defines the PID Source name.
Maximum 50 characters can be entered. Additional explanation
can be entered.
Determines PID control loop input variable (the process variable
to be controlled). The input source can be assigned one of the
analog channels defined in the recorder. It can be slot analog inputs,
modbus channels or math channels)
Determines set input style of PID control loop. When selected as
, set input is entered manually using on screen keyboard
(see Figure 6.73). Conversely, when selected as ,
set input is applied using an external analog source which is defined
by the parameter
.
Minimum configurable internal set value.
Maximum configurable internal set value.
Minimum output value in %percentage. When the calculated output
value is less than the minimum output value, the output value is set
to minimum output value.
Maximum output value in %percentage. When the calculated output
value is more than the maximum output value, the output value is
set to maximum output value.
INTERNAL
EXTERNAL
Set Source