a,b,c,d,e,f,m, n = Constants (settings)
x = Input value
y = Output value
If x is large and m, n, e are not set to small values, the output will overflow. Similarly,
if x can be negative then m and n must be natural numbers.
In equation mode, the WARNING output goes high when large output value numbers, typically above
8388607 (absolute), are rounded to the last decimal point.
10.1.6.4 Status information
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The following table summarizes the status information generated by the ANSCAL function.
Table 64: ANSCAL status output signals
Name Description
WARNING Combined warning signal, TRUE (1) on any of the following conditions:
• In Chart mode, when the input signal is inside the permitted range but outside the
compensation range (see
Table 63.)
• In Equation mode, if the absolute output value is too large to ensure full numerical
accuracy
ALARM Combined alarm signal, TRUE (1) if any of the following conditions is detected:
• Faulty sensor
• Settings X for curve point input values in Chart mode are out of sequence
• INPUT value is lower than LowLimit or higher than HighLimit
• BLKFUNC input is 1
SENSTSOUT Sensor status output for IEC 61850 reporting purpose:
TRUE (1) – Sensor status is unhealthy
FALSE (0) – Sensor status is healthy
10.2 Double point input status time monitoring DPISTTIM
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10.2.1 Identification
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Function description
IEC 61850 identification IEC 60617
identification
ANSI/IEEE C37.2 device
number
Double point input status time
monitoring
DPISTTIM - -
10.2.2 Functionality
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The Double point indication status times DPISTTIM function computes the status times of a double
point indication (DPI) by counting the times since the last status changeovers. The inputs for this
function are two boolean signals of a DPI. The outputs provide the time either in milliseconds,
seconds, minutes, or hours from the last status changeover. DPISTTIM function can be used for
computing the idle times, that is, time since the last open and close operations of a switch.
1MRK 511 557-UEN Rev. A Section 10
General calculation
103
Technical Manual
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