Tag Warning V2 - Siemens SIMATIC S7-1200 Function Manual
Pid control
Hide thumbs
Also See for SIMATIC S7-1200:
- Manual (364 pages) ,
- System manual (338 pages) ,
- Reference manual (89 pages)
Table of Contents
Advertisement
9.1.4.11
Tag Warning V2
If several warnings are pending simultaneously, the values of the Warning tag are displayed
with binary addition. The display of warning 0003h, for example, indicates that the warnings
0001h and 0002h are pending simultaneously.
Warning
Description
(DW#16#....)
0000
No warning pending.
0001
The point of inflection was not found during pretuning.
0004
The setpoint was limited to the configured limits.
0008
Not all the necessary controlled system properties were defined for the selected method of calculation.
Instead, the PID parameters were calculated using the TIR.TuneRule = 3 method.
0010
The operating mode could not be changed because Reset = TRUE or ManualEnable = TRUE.
0020
The cycle time of the calling OB limits the sampling time of the PID algorithm.
Improve results by using shorter OB cycle times.
0040
The process value exceeded one of its warning limits.
0080
Invalid value at Mode. The operating mode is not switched.
0100
The manual value was limited to the limits of the controller output.
0200
The specified rule for tuning is not supported. No PID parameters are calculated.
1000
The substitute output value cannot be reached because it is outside the output value limits.
The following warnings are deleted as soon as the cause is eliminated:
● 0001h
● 0004h
● 0008h
● 0040h
● 0100h
All other warnings are cleared with a rising edge at Reset or ErrorAck.
PID control
Function Manual, 03/2017, A5E35300227-AC
Instructions
9.1 PID_Compact
273
Advertisement
Table of Contents
