Tag Warning V2 - Siemens SIMATIC S7-1200 Function Manual
Pid control
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Also See for SIMATIC S7-1200:
- Manual (364 pages) ,
- System manual (338 pages) ,
- Reference manual (89 pages)
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Instructions
9.2 PID_3Step
9.2.4.11
Tag Warning V2
If several warnings are pending simultaneously, their values are displayed with binary
addition. The display of warning 0005h, for example, indicates that the warnings 0001h and
0004h 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.
0400
The transition time cannot be measured because the actuator settings do not match the selected meas-
uring method.
0800
The difference between the current position and the new output value is too small for transition time
measurement. This can produce incorrect results. The difference between the current output value and
new output value must be at least 50% of the entire control range.
1000
The substitute output value cannot be reached because it is outside the output value limits.
2000
The actuator was moved in one direction for longer than Config.VirtualActuatorLimit × Re-
tain.TransitTime. Check whether the actuator has reached an endstop signal.
The following warnings are deleted as soon as the cause is eliminated:
● 0001h
● 0004h
● 0008h
● 0040h
● 0100h
● 2000h
All other warnings are cleared with a rising edge at Reset or ErrorAck.
340
Function Manual, 03/2017, A5E35300227-AC
PID control
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