Advanced Settings V2 - Siemens SIMATIC S7-1200 Function Manual

Using PID_Compact
4.2 PID_Compact V2
4.2.1.3

Advanced settings V2

Process value monitoring V2
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 will be displayed at the PID_Compact 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 will be 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_Compact 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
In the output value settings, you can specify the reaction of PID_Compact when the process
value high limit or low limit is violated.
See also
Parameters State and Mode V2 (Page 265)
78
InputWarn- InputWarn-
ing_H ing_L
TRUE FALSE
TRUE FALSE
FALSE FALSE
FALSE TRUE
FALSE TRUE
Error- Operating mode
Bits
0001h Inactive or
Substitute output value with error
monitoring
0000h Automatic mode
0000h Automatic mode
0000h Automatic mode
0001h Inactive or
Substitute output value with error
monitoring
Function Manual, 03/2017, A5E35300227-AC
PID control