(4) Output 1 inverted output
If equipped with contact output for output 1, inverted output can be executed for output 1 by selecting (output 1
inverted output) for the event code. Output is, however, OFF for both output 1 and event when the power is off.
Also, inverted output for output 1 can be executed as well during standby.
(5) Event status output action
EXE signal Fixed value control (FIX mode) output during control action.
RUN signal Output during program execution during program control.
HC1 Output during alarm action of either heater 1 break/loop.
HC2 Output during alarm action of either heater 2 break/loop.
STPS Step signal Ouput for 1 second each time step in program control execution is completed.
PTNS Pattern signal Ouput for 1 second each time pattern in program control execution is completed.
ENDS Program end signal Output for 1 second when program control execution is completed.
(Output even if program is forcibly completed halfway.)
HOLD Hold signal Output when holding (temporary halt of program) during program control.
PROG Program signal Output when set to program mode.
U_SL Up slope signal Output during up slope step execution during program control.
D_SL Down slope signal Output during down slope step execution during program control.
GUA Guarantee soak signal Output when guarantee soak is engaged.
8-2. Heater break/loop alarm
Heater break/loop alarm can be used only in control output Y (contact) or P (SSR drive voltage output).
Heater break/loop alarm becomes effective if CT input or event output is equipped.
Heater break alarm outputs an alarm if the current value detected by CT when control output is ON is lower than the setting.
Heater break check is disabled if control output is OFF. Heater break status in the latest output-ON period is maintained.
Heater loop alarm also outputs an alarm if the current value detected by CT when control output is OFF is higher than the setting.
Heater loop check is disabled if control output is ON. Heater loop status in the latest output-OFF period is maintained.
In the SRS10A series, 2 points of CT input is equipped if the CT input option is selected.
Any break of 2 heating stages control heater or three-phase heater can be detected by using two CT.
For 2 heating stages For three-phase
8-3. P.I.D.
(1) P (Proportional action)
Sets percentage at which control output varies for measuring range. The size of control output varies according to ratio of PV value
to SV value.
Slight proportional band variation results in strong proportional action. If it is too slight, control vibrates and the results of control
are similar to ON-OFF action.
(2) I (Integral time)
Function that corrects offset (constant deviation) produced by proportional band. The longer the integral time, the weaker the
corrective action and the shorter the time, the stronger the action is, but control may vibrate due to integral hunting.
(3) D (Derivative time)
Enhances stability by estimating change in control output and suppressing integral overshoot.
The longer the derivative time, the stronger derivative action is, but control results may be similar to vibration.
CT1
CT2
SRS10A Series
CT
CT
Heater
Heater
Broken area
CT1
CT2
CT1
CT2
Heater C
SRS10A Series
Heater A
Heater B
CT
CT
Detectable
Undetectable
Undetectable
Detectable
Detectable
Detectable
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