3. Instruction Set
Function Setup Range Explanation
S
3
+4: Control mode
1: Forward control (E = SV - PV).
2: Reverse control (E = PV - SV).
3: Auto-tuning of parameter exclusively for the temperature
control. The device will automatically become K4 when
the auto-tuning is completed and K
P
, K
I
and K
D
is set with
appropriate value (not avaliable in the 32-bit instruction).
4: Exclusively for the adjusted temperature control (not
avaliable in the 32-bit instruction).
5: Automatic mode with MV upper/lower bound control.
When MV reaches upper/lower bound, the accumulation
of integral value stops.
7: Manual control 1: User set an MV. The accumulated
integral value increases according to the error. It is
suggested that the control mode should be used in a
control environment which change more slowly.
DVP-ES2/DVP-EX2/DVP-SS2/DVP-SA2/DVP-SX2
series PLCs whose version is 2.00 (or above), and
DVP-SE series PLCs whose version is 1.00 (or above)
are supported.
8: Manual control 2: User set an MV. The accumulated
integral value will stop increasing. When the control
mode becomes the automatic mode (the control mode
K5 is used), the instruction PID outputs an appropriate
accumulated integral value according to the last MV.
DVP-ES2/DVP-EX2/DVP-SS2/DVP-SA2/DVP-SX2
series PLCs whose version is 2.00 (or above), and
DVP-SE series PLCs whose version is 1.00 (or above)
are supported.
9: When in Automatic mode, if the MV exceeds the
upper/lower limits, MV calculates according to
upper/lower limits to calculate the accumulated integral
calculus.
10: TI / TD mode: The control changes the integra gain and
the differential gain into integral time constant and
differential time constant.
S
3
+5:
Tolerable range for
error (E)
0~32,767
E = the error between SV and PV. If S
3
+5 is set as 5, when E is between -5
and 5, E will be 0. When S
3
+5 = K0,
the function will not be enabled.
S
3
+6:
Upper bound of
output value (MV)
-32,768~32,767
3
+6 is set as 1,000, MV will be
1,000 when it exceeds 1,000. S
3
+6 has
to be bigger or equal to
S
3
+7, otherwise the upper bound and
lower bound value will switch.
S
3
+7:
Lower bound of
output value (MV)
-32,768~32,767
3
+7 is set as -1,000, MV will be
-1,000 when it is smaller than -1,000..
S
3
+8:
Upper bound of
integral value
-32,768~32,767
3
+8 is set as 1,000, the integral
value will be 1,000 when it is bigger
than 1,000 and the integration will
stop. S
3
+8 has to be bigger or equal S
3
+9; otherwise the upper bound and
lower bound value will switch