Applies To:
  • CitectSCADA 5.00

Summary:
A number of parameters have been added to the Citect.ini file to provide extensive debug information on the SPC calculations.  

Solution:
These are :

[SPC]
TrendDebugSPCServer
TrendDebugSPCClient

Possible values for these parameters and their effect are shown below (note: values can be ANDed together):

TrendDebugSPCServer:
TrendDebugSPCServer = 1

  • SPC values calculated by the server and used for calculating alarm values. These values include:

Pen Name
Subgroup Size
No. Subgroups

Process Mean
Process Range
Process Std Dev

SPC_XLCL
SPC_XUCL
SPC_RLCL
SPC_RUCL
SPC_SLCL
SPC_SUCL

TrendDebugSPCServer = 2

  • Alarm values and counters. These values include:

Pen Name
Current X
Previous X
Current R
SPC_XLWL
SPC_XUWL

FreakCount
XOutsideCLCount
XOutsideWLCount
XAboveUCLCount
XBelowLCLCount
XUpTrendCount
XDnTrendCount
XGradualUpCount
XGradualDnCount
XErraticCount
XStratCount
XMixCount
ROutsideCLCount
RAboveUCLCount
RBelowLCLCount

TrendDebugSPCClient:
TrendDebugSPCClient = 1

  • SPC values calculated by the client for display. These values include:

Pen Name
Subgroup Size
No. Subgroups

Process Mean
Process Range
Process Std Dev

Upper Spec Lim
Lower Spec Lim

Skewness
Kurtosis
CP Potential
CP Actual
SPC_XLCL / SPC_RLCL / SPC_SLCL
SPC_XUCL / SPC_RUCL / SPC_SUCL

TrendDebugSPCClient = 2

  • Data used for calculating SPC values. These values include (in listed format):

Subgroup No., Subgroup Mean, Subgroup Range, Subgroup Standard Deviation

TrendDebugSPCClient = 4

  • Raw and calculated values used for calculating the Histogram.

NOTE: These parameters log large amounts of data to the SYSLOG.DAT file which may effect the performance of Citect. They should not be used unless expressly instructed to do so by Citect Support. See the Citect help for the equations used to generate the above information.

 

Keywords:
 

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