YOKOGAWA GX20

13
All Rights Reserved. Copyright © 2012, Yokogawa Electric Corporation
GS 04L51B01-01EN
June. 14, 2017-00
FAILOUTPUT(/FL)
• Contact:Ccontact,1point
• FAILoutput:
The relay contact output on the rear panel
indicatestheoccurrenceofCPUfailure.
Relay operation: Energized during normal
operationandde-energizedonCPUfailure.
• Statusoutput:Therelaycontact,whichisde-
energized in normal output state, is energized
upontheoccurrenceofamemory/mediaerror,
measurement error, communication error,
recording stop, or alarm.
• Ratedpowersupplyvoltage:24VDCor250V
AC or less
• Ratedloadcurrent:3A(DC)/3A(AC),resistance
load
• Min.loadcurrent:100mA
• Recommendedreplacementperiodsofcontact:
 Electrical:30,000moreON-OFFoperations,
Mechanical:5,000,000moreON-OFFoperations
LogSCALE(/LG)
 Alogarithmicvoltagethathasbeenconvertedfrom
a physical value is applied to the GX, and then the
GX’sLogscale(logarithmicscale)isusedtodisplay
and record the physical value.
• Inputtype:Loginput(logarithmicinput),Pseudo
log input: An input that supports pseudo
logs,Loglinearinput:Inputthatislinearona
logarithmic scale.
• Range:20mV/60mV/200mV/1V/2V/6V/20V/50V/
100V
• Scalablerange:
• Loginput:
 1.00E-15to1.00E+15(15decade
maximum)
 Scale_L<Scale_U
 Ifthelowerlimitmantissais1.00,the
differencebetweentheexponentsmustbe
1 or more.
 Ifthelowerlimitmantissaisavalueother
than1.00,thedifferencebetweenthe
exponentsmustbe2ormore.
• PseudoLogInput/Loglinearinput
 1.00E-15to1.00E+15(15decade
maximum)
The higher limit mantissa is the same as
the lower limit mantissa).
 Ifthelowerlimitmantissais1.00,thevalue
mustbebetween1.00E–15and1.00E+15,
thedifferencebetweentheexponentsmust
be1ormore,andthemaximumdecadesis
15.
 Ifthelowerlimitmantissaisavalueother
than 1.00, the value must be between
1.01E–15and9.99E+14,thedifference
betweentheexponentsmustbe1ormore
andthemaximumdecadesis15.
• Alarmtype:Highlimit,lowlimit,delayhighlimit,
and delay low limit
• Alarmsettingrange:Therangeconvertedinto
theLOGscalecorrespondingto-5%to105%of
the span width.
• Alarmhysteresis:Fixedto0
• Greenbandsettingrange:Thelowerlimittothe
upperlimitofthescale.However,thelowerlimit
ofthedisplaypositionmustbesmallerthanthe
upper limit.
• Positionofthedecimalpoint:1to2
• Misc:Nonlinearinputispossiblebycorrecting
the input value
MATHEMATICAL FUNCTIONS WITH REPORT
FUNCTION(/MT)
MathematicalFunction:
• Numberofmathchannels;GX10:50,GX20-1:
100, GX20-2: 200
Note) Note:Dependingonthemeasurementmode,
thereisalimittothenumberofmathchannels
at scan intervals shorter than 100 ms. See
“Limitations.”
• Scaninterval
Measurementmode Scaninterval
Normal Scan interval
High speed Scan interval
Dualinterval Master scan interval*
* WhenthemeasurementmodeisDualinterval,
this item sets which scan interval to use, the
intervalofmeasurementgroup1orthatofscan
group2,forcreatingmeasuredvaluesofmath
or communication channels and other similar
operations.
• Numberofexpressions:
• Operation:
General arithmetic operations: Four arithmetic
operations(+,-,*,/),squareroot,absolute,
common logarithm, natural logarithm,
exponential,andpower
 Relationaloperations:<,≤,>,≥,=,and≠
 Logicoperations:AND,OR,NOT,andXOR
 Statisticaloperations:TLOG(maximum,
minimum,average,sum,P-Pvaluesoftime
seriesdata)orCLOG(maximum,minimum,
average,sum,P-Pvaluesofaspeciedchannel)
 Specialoperations:PRE,HOLD,RESET,and
CARRY
Conditional operation: [a?b:c]
 Bitoperation:BIT
 Integerextractingoperation:INT
 Remainderextractingoperation:MOD
 Trigonometricfunctions:SIN,COS
 CPoperations:CP.02,CP.CO2
• Computationaccuracy:Double-precisionoating
point
• Datathatcanbeused;
Channel data: Measurement channels (0001 to
6516), mathematical channels (GX10: A001 to
A050, GX20-1: A001 to A100, GX20-2: A001 to
A200), Communication channels (GX10: C001
to C050, GX20-1: C001 to C300, GX20-2: C001
to C500), Communication channels raw data
(GX10: RC001 to RC050, GX20-1: C001 to
C300, GX20-2: RC001 to RC500), Constants:
K001toK100,Variableconstant:W001toW100,
Internalswitch:S001toS100,Flag:F01toF20,
Recording state (REC01), Integer data: Z000 to
Z999