ROC GC Write Override Tab

GC Write Override Tab

The GC Write tab allows users to configure which TLPs are written to upon gas chromatograph write events.

Configuring GC Write override is optional. If you do not configure GC Write overrides here, the ROC protocol will default to the following TLPs:

Component	ROC 800 Gas Meters	ROC800 Liquid Meters	All other Gas Meters

Component	ROC 800 Gas Meters	ROC800 Liquid Meters	All other Gas Meters
METHANE	112.28	203.105	7.28
ETHANE	112.29	203.106	7.29
PROPANE	112.30	203.107	7.30
IBUTANE	112.32	203.109	7.32
NBUTANE	112.31	203.108	7.31
IPENTANE	112.34	203.111	7.34
NPENTANE	112.33	203.110	7.33
NEOPENTANE	N/A	203.104	N/A
NHEXANE	112.35	203.112	7.35
NHEPTANE	112.36	203.113	7.36
NOCTANE	112.37	203.104	7.37
NDECANE	112.39	203.126	7.39
C6PLUS	112.47	N/A	N/A
H2	112.45	N/A	7.42
H2O	112.41	203.128	7.26
H2S	112.40	203.120	7.25
O2	112.43	203.118	7.40
CO	112.44	N/A	7.41
CO2	112.27	203.119	7.24
N2	112.26	203.117	7.23
HELIUM	112.42	203.127	7.27
ARGON	N/A	N/A	N/A
BTU	112.22	N/A	7.6
SPECIFICGRAVITY	112.23	N/A	7.5
USERDEFINEDSTRING1	N/A	N/A	N/A
USERDEFINEDSTRING2	N/A	N/A	N/A
USERDEFINEDDOUBLE1	N/A	201.8	N/A
USERDEFINEDDOUBLE2	N/A	N/A	N/A
USERSTRING	N/A	N/A	N/A

If you do link a Gas Chromatograph object for a specific meter and you wish to override the default TLP that is written to for a specific component, you must be explicit which TLP you would like to write to. In the example below, for the meter in question, when the user or system sends a USERDEFINEDDOUBLE1 value, that value will be written to the soft point 98.3:4. Since all the other component entries in that Gas Chromatograph object example are empty, they will default to the TLP as defined in the table above.