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Siemens SIMATIC S7-1500T Function Manual

Siemens SIMATIC S7-1500T
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Using PID_Temp
6.2 Configuring PID_Temp
PID control
Function Manual, 03/2017, A5E35300227-AC
165
Reaction to error
NOTICE
Your system may be damaged.
If you output "Current value while error is pending " or "Substitute output value while error is
pending" in the event of an error, PID_Temp remains in automatic mode or in manual
mode. This may cause a violation of the process value limits and damage your system.
It is essential to configure how your controlled system reacts in the event of an error to
protect your system from damage.
PID_Temp is preset so that the controller stays active in most cases in the event of an error.
If errors occur frequently in controller mode, this default reaction has a negative effect on the
control response. In this case, check the ErrorBits parameter and eliminate the cause of the
error.
PID_Temp generates a programmable output value in response to an error:
Zero (inactive)
At all errors, PID_Temp switches to the "Inactive" operating mode and outputs the
following:
0.0 as PID output value (PidOutputSum)
0.0 as output value for heating (OutputHeat) and output value for cooling (OutputCool)
0 as analog output value for heating (OutputHeat_PER) and analog output value for
cooling (OutputCool_PER)
FALSE as PWM output value for heating (OutputHeat_PWM) and PWM output value
for cooling (OutputCool_PWM)
This is independent of the configured output value limits and the scaling. The controller is
only reactivated by a falling edge at Reset or a rising edge at ModeActivate.
Current value while error is pending
The error response depends on the error occurring and the operating mode.
If one or more of the following errors occur in automatic mode, PID_Temp stays in
automatic mode:
0000001h: The Input parameter is outside the process value limits.
0000800h: Sampling time error
0040000h: Invalid value at Disturbance parameter.
8000000h: Error during the calculation of the PID parameters.

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Siemens SIMATIC S7-1500T Specifications

General IconGeneral
BrandSiemens
ModelSIMATIC S7-1500T
CategoryController
LanguageEnglish

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