Performance Specifications; Calculation Method - Omron CJ - INSTRUCTIONS Reference Manual

3. Instructions
• For proportional operation only, the manipulated variable output when the PV equals the SV can be
designated as follows:
0: Output 0%
1: Output 50%.
• The direction of proportional operation can be designated as either forward or reverse.
• The upper and lower limits of the manipulated variable output can be designated.
• The sampling period can be designated in units of 10 ms (0.01 to 99.99 s), but the actual PID action
is determined by a combination of the sampling period and the time of PID(190) instruction execution
(with each cycle).
• The timing of enabling changes made to PID constants can be set to either 1) the beginning of PID
instruction execution or 2) the beginning of PID instruction execution and each sampling period. Only
the proportional band (P), integral constant (Tik), and derivative constant (Tdk) can be changed each
sampling cycle (i.e., during PID instruction execution). The timing is set in bit 1 of C+5.

Performance Specifications

Item
PID control method
Number of PID control loops
Sampling period
PID constant Proportional band
Integral constant
Derivative constant
Set value
Measured value
Manipulated variable

Calculation Method

Calculations in PID control are performed by the target value filtered control with two degrees of
freedom.
642
--- Target value filter-type two-degrees-of-freedom PID method (forward/reverse)
--- Unlimited (1 loop per instruction)
0.01 to 99.99 s
P 0.1 to 999.9%
Tik 1 to 8191, 9999 (No integral action for sampling period multiple, 9999.)
Tdk 0 to 8191 (No derivative action for sampling period multiple, 0.)
SV 0 to 65535 (Valid up to maximum value of input range.)
PV 0 to 65535 (Valid up to maximum value of input range.)
MV 0 to 65535 (Valid up to maximum value of output range.)
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Specifications