ALTUS Nexto NX3004 - PID Function Block

4. Configuration
210
PID Function Block
The PID function block is used to control a real process. The block is always available in the
NextoPID library which must be added to the project (for the library insertion proceeding, see
MasterTool IEC XE Programming Manual – MP399608, chapter Library).
Figure 4-104. PID Block
Input parameters
Type
Description
SP
REAL
Set point.
The unit and the interval must be the same in
comparison with the PV as both variables can be
compared.
PV
REAL
Process variable.
The unit and the interval must be the same in
comparison with the SP as both variables can be
compared.
Gp
REAL
Proportional gain used to calculate the PID block
proportional action.
Td
REAL
Derivative time, in seconds, used to calculate the
PID block derivative action.
Ti
REAL
Integral time, in seconds, used to calculate the PID
block integral action.
BIAS
REAL
Compensation added to the handled variable.
ManualMV
REAL
Value attributed to the manipulated variable when
using the manual mode.
MaxVarMV
REAL
Manipulated variable maximum variation between
the actual cycle and the previous cycle. In case is
zero or negative, the PID block has no MV variation
limit.
MaxMV
REAL
Manipulated variable maximum value.
In case the calculated value is higher than the
configured, the MV will be the same as MaxMV.
MinMV
REAL
Manipulated variable minimum value.
In case the calculated value is smaller than the
configured, the MV will be the same as MinMV.