Table of Contents
Advertisement
3. Instructions
PID Parameter Settings
Control data
Item
C
Set value (SV)
C+1
Proportional band
C+2
Tik
Integral Constant
C+3
Tdk
Derivative Constant
C+4
Sampling period ( )
Bits 04 to 15 of
2-PID parameter ( )
C+5
Bit 03 of C+5
Manipulated variable
output designation
Bit 01 of C+5
PID constant change
enable setting
Bit 00 of C+5
PID forward/reverse
designation
Bits 13 to 14 of
ID starting integral
C+6
manipulated variable
designation (unit version
4.0 or later only)
Bit 12 of C+6
Manipulated variable
output limit control
Bits 08 to 11 of
Input range
C+6
Bits 04 to 07 of
Integral and derivative unit
C+6
Bits 00 to 03 of
Output range
C+6
C+7
Manipulated variable
output lower limit
C+8
Manipulated variable
output upper limit
636
Contents
The target value of the process being
controlled.
The parameter for P action expressing the
proportional control range/total control
range.
A constant expressing the strength of the
integral action. As this value increases, the
integral strength decreases.
A constant expressing the strength of the
derivative action. As this value increases,
the derivative strength decreases.
Sets the period for executing the PID
action.
The input filter coefficient. Normally use
0.65 (i.e., a setting of 000). The filter
efficiency decreases as the coefficient
approaches 0.
Designates the manipulated variable
output when the PV equals the SV.
This setting is enabled when there is no
integral operation.
The timing of enabling changes made to
the proportional band (P), integral
constant (Tik), and derivative constant
(Tdk) for use in PID calculations.
Determines the direction of the
proportional action.
Determines the initial integral manipulated
variable when PID control is started (i.e.,
when the input turns ON).
Determines whether or not limit control will
apply to the manipulated variable output.
The number of input data bits.
Determines the unit for expressing the
integral and derivative constants.
The number of output data bits.
The lower limit for when the manipulated
variable output limit is enabled.
The upper limit for when the manipulated
variable output limit is enabled.
Setting range
Binary data (of the same number of bits as
specified for the input range)
0001 to 270F hex (1 to 9999);
(0.1% to 999.9%, in units of 0.1%)
0001 to 1FFF hex (1 to 8191);
(9999 = Integral operation not executed)
When "1" is specified for the
integral/differential constant: 1 to 8191
When "9" is specified: 0.1 to 819.1 s
(See note 1.)
0001 to 1FFF hex (1 to 8191);
(0000 = Derivative operation not executed)
When "1" is specified for the
integral/differential constant: 1 to 8191
When "9" is specified: 0.1 to 819.1 s
(See note 1.)
0001 to 270F hex (1 to 9999);
(0.01 to 99.99 s, in units of 10 ms)
000 hex:
= 0.65
Setting from 100 to 163 hex means that
the value of the rightmost two digits is set
from = 0.00 to = 0.99. (See note 2.)
0: Output 0%
1: Output 50%
0: At start of PID instruction execution
1: At start of PID instruction execution and
each sampling period
0: Reverse action
1: Forward action
Bit 14 = 0 and bit 13=0:
Start from same integral manipulated
value as manipulated variable output
designation (Pre-Ver. 4.0 operation).
Bit 14 = 0 or 1 and bit 13 = 1:
Bumpless operation (i.e., start from an
integral manipulated variable that will not
abruptly change the manipulated variable
output and result in a continuous change).
Bit 14 = 1 and bit 13 = 0:
Start with integral manipulated variable =
0.
0: Disabled (no limit control)
1: Enabled (limit control)
0: 8 bits
5: 13 bits
1: 9 bits
6: 14 bits
2: 10 bits
7: 15 bits
3: 11 bits
8: 16 bits
4: 12 bits
1: Sampling period multiple
9: Time (unit: 100 ms)
(See note 1.)
0: 8 bits
5: 13 bits
1: 9 bits
6: 14 bits
2: 10 bits
7: 15 bits
3: 11 bits
8: 16 bits
4: 12 bits
0000 to FFFF (binary)
(See note 3.)
0000 to FFFF (binary)
(See note 3.)
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Change with ON
input condition
Allowed
Can be changed
with input condition
ON if bit 1 of C+5
is 1.
Not allowed
Allowed
Not allowed
Advertisement
Chapters
Table of Contents
