Advanced Settings; Process Value Monitoring - Siemens SIMATIC S7-1200 Function Manual

Using PID_Temp
6.2 Configuring PID_Temp
6.2.4

Advanced settings

6.2.4.1

Process value monitoring

Configure a warning high and low limit for the process value in the "Process value
monitoring" configuration window. If one of the warning limits is exceeded or undershot
during operation, a warning is displayed at the PID_Temp instruction:
● At the InputWarning_H output parameter if the warning high limit has been exceeded
● At the InputWarning_L output parameter if the warning low limit has been undershot
The warning limits must be within the process value high and low limits.
The process value high and low limits are used if you do not enter values.
Example
Process value high limit = 98° C; warning high limit = 90° C
Warning low limit = 10° C; process value low limit = 0° C
PID_Temp will respond as follows:
Process value
> 98 °C
≤ 98° C and > 90° C
≤ 90° C and ≥ 10° C
< 10° C and ≥ 0° C
< 0° C
You can configure the response of PID_Temp when the process value high limit or low limit
is violated in the output settings.
170
InputWarning_H InputWarning_L
TRUE FALSE
TRUE FALSE
FALSE FALSE
FALSE TRUE
FALSE TRUE
Function Manual, 03/2017, A5E35300227-AC
ErrorBits
0001h
0000h
0000h
0000h
0001h
PID control