Omron SYSMAC C200HS Operation Manual page 257

Special Math Instructions
Flags
Example
AD001 DA001
#0 #1
hunting will be reduced if the integral time is increased or the proportional band
is enlarged.
• If the period is short and hunting occurs, it may be that the control system re-
sponse is quick and the derivative operation is too strong. In that case, set the
derivative operation lower.
SV
Content of :DM word is not BCD, or the DM area boundary has been
ER:
exceeded.
A PID parameter SV is out of range.
The PID operation was executed but the cycle time was two times the
sampling period. PID(––) will be executed for this error only even when
ER (SR25503) is ON.
CY: The PID operation is being executed.
This example shows a PID control program using PID(––).
Amplifier (See note below.)
Amplifier (See note below.)
Note Motors and heaters cannot be directly connected from a Analog Output Unit. An
amplifier (i.e., a current amplification circuit) is required.
Control by measured PID
(when loose hunting occurs)
SV
Enlarge I or P.
Control by measured PID
(when hunting occurs in a short period)
Lower D.
C200HS
CPU
Fan (Output word IR 111)
Temperature sensing element
(Output word IR 100)
Heater (Output word IR110)
Section 5-21
247