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• The setting items of the parameter (S3) are listed below.
Setting item
(S3)
Sampling time (T
(S3)+1
Operation setting
(ACT)
(S3)+2
Input filter constant ()
(S3)+3
Proportional gain (K
(S3)+4
Integral time (T
(S3)+5
Derivative gain (K
(S3)+6
Derivative time (T
(S3)+7 to
Occupied for internal processing of PID operation, and therefore it is prohibited to change data.
(S3)+19
*2
(S3)+20
Rate of change in input (increase side)
Alert setting value
*2
(S3)+21
Rate of change in input (decrease side)
Alert setting value
*2
(S3)+22
Rate of change in output (increase side)
Alert setting value
Output upper limit setting value
*2
(S3)+23
Rate of change in output (decrease
side) Alert setting value
Output lower limit setting value
*2
(S3)+24
Alarm output
(S3)+25
PV value threshold (Hysteresis)width
(SHpv)
(S3)+26
Upper limit value of output (ULV)
(S3)+27
Lower limit value of output value (LLV)
(S3)+28
Wait setting parameter (K
end of tuning cycle to the start of PID
control
*2 (S3)+20 to (S3)+24 are occupied when bit 1 of the action setting (ACT) in (S3)+1 = 1 and bit 2 = 1 or bit 5 = 1.
7 APPLICATION INSTRUCTIONS
730
7.18 PID Instruction
Description
)
1 to 32767 ms
S
Bit 0
0: Direct action
1: Reverse action
Bit 1
0: Disable alert for rate of change in input.
1: Enable alert for rate of change in input.
Bit 2
0: Disable alert for rate of change in output.
1: Enable alert for rate of change in output.
Bit 3
Unusable
Bit 4
0: Disable auto tuning.
1: Enable auto tuning.
Bit 5
0: Disable upper and lower limit setting of output value.
1: Enable upper and lower limit setting of output value.
Bit 6
0: Step response method
1: Limit cycle method
Bits 7 to 15
Unusable
0 to 99%
)
1 to 32767%
P
0 to 32767 100ms
)
I
)
0 to 100%
D
0 to 32767% 10ms
)
D
0 to 32767 100ms
0 to 32767
0 to 32767
-32768 to 32767
0 to 32767
-32768 to 32767
Bit 0
0: Rate of change in input (increase side) not
exceeded
1: Rate of change in input (increase side) exceeded
Bit 1
0: Rate of change in input (decrease side) not
exceeded
1: Rate of change in input (decrease side) exceeded
Bit 2
0: Rate of change in output (increase side) not
exceeded
1: Rate of change in output (increase side) exceeded
Bit 3
0: Rate of change in output (decrease side) not
exceeded
1: Rate of change in output (decrease side) exceeded
Set depending to the fluctuation of process value (PV).
Set the maximum output value (ULV) of manipulated
value (MV).
Set the minimum output value (LLV) of manipulated
value (MV).
) from the
-50 to 32717%
W
Remark
The instruction cannot be used with a
value smaller than the operation cycle.
Specify the operation direction.
Do not set bits 2 and 5 to ON
simultaneously.
Do not set bits 2 and 5 to ON
simultaneously.
Select the auto tuning mode.
If 0 is specified, no input filter is used.
Specifying 0 assumes . (No
integration)
Specifying 0 means no derivative gain.
Specifying 0 means no derivation.
Action direction (ACT): (S3)+1
Enabled when bit 1 = 1.
Action direction (ACT): (S3)+1
Enabled when bit 1 = 1.
Action direction (ACT): (S3)+1
Enabled when bit 2 = 1 and bit 5 = 0.
Action direction (ACT): (S3)+1
Enabled when bit 2 = 0 and bit 5 = 1.
Action direction (ACT): (S3)+1
Enabled when bit 2 = 1 and bit 5 = 0.
Action direction (ACT): (S3)+1
Enabled when bit 2 = 0 and bit 5 = 1.
Action direction (ACT): (S3)+1
Enabled when bit 1 = 1 or bit 2 = 1.
Action direction (ACT)
Bit 6: Occupied when the limit cycle
method (ON) is selected.
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