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Vutlan analog sensors have analog inputs and analog or discrete outputs.

If the analog sensor is not connected or undefined, such sensor will be in a state of 'not connected'.

The analog sensor parameters of the VUTLAN devices can be located depending on their physical location in the sub-branches:

ctlInternalSensors - main system sensors;
- ctlInternalSensorsAnalogsTable;
ctlCANSensors - CAN bus sensors;
- ctlCANSensorsAnalogsTable;
ctlRsSensors - serial port sensors;
- ctlRsSensorsAnalogsTable;

Example. Viewing analog sensors:

$ snmptable -Ci -Cb -v2c -cread 192.168.0.193 VUTLAN-SYSTEM-MIB::ctlInternalSensorsAnalogsTable

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SNMP table: VUTLAN-SYSTEM-MIB::ctlInternalSensorsAnalogsTable

     Id Module Num          Type          Name          State Value     Min    Max LowAlarm LowWarning HighWarning HighAlarm   At0 At75 Expression Specific
201001      2001    -1 "temperature" "Temperature"      "high alarm" "34.2" "-50.0" "110.0"     "5.0" "10.0"            "15.0"        "20.0"   "1.0" "0.0"        "x"       ""
203001      2001    -2          "voltage" "Voltage"            "warning" "11.3" "0.0" "24.0"    "5.0"          "10.0"            "15.0"        "20.0"   "1.0" "0.0"        "x"       ""
204001      2002      2        "fvoltage"        "Analog-2"    "low alarm"    "0.0"      "0.0"   "10.0"   "5.0"    "10.0"          "15.0"        "20.0"   "1.0" "0.0"        "x"       ""
201002      2002     3 "temperature"        "Analog-3"      "high alarm" "27.5" "-50.0" "110.0"       "5.0"          "10.0"      "15.0"        "20.0"   "1.0" "0.0"        "x"       ""

The location of such sensors in the system is determined by the module identifier in which this element is physically located and with the port number in the module - Num.

Sensor with analog output can be in one of the following states defined with thresholds ctlAnalogLowAlarm, ctlAnalogLowWarning, ctlAnalogHighWarning, ctlAnalogHighAlarm:

'normal' - the measured value is above the threshold ctlAnalogLow, but below the threshold ctlAnalogWarning, ctlAnalogAlarm;
'low alarm' - below normal, the measured value is below the threshold ctlAnalogLowAlarm;
'low warning' - below normal, the measured value is above the threshold ctlAnalogLowAlarm, but below the threshold ctlAnalogLowWarning;
'high warning' - above normal, the measured value is above the threshold ctlAnalogHighWarning, but below the threshold ctlAnalogHighAlarm;
'high alarm' - measured value is above the threshold ctlAnalogHighAlarm;

Fields ctlAnalogAT0 (default "1.0") and ctlAnalogAT75 (default "0.0") are only for the voltage sensors and set the coefficients to convert the measured value using the following formula:

U=ctlAnalogAT0*U0+ctlAnalogAT75

Field ctlAnalogExpression (default "x") has meaning only for the current sensor (4-20mA), and sets the expression to convert the measured value:

Value=ctlAnalogExpression(x)

thus the default readings correspond to the measured values with no additional changes.

It supports the following operations: "+", "-", "/", "*", "%"(modulo), "^"(involution)

Support the following functions:

"abs" - absolute value;
"sqrt" - square root;
"exp" - exponential;
"ln" - the natural logarithm;
"log" - logarithm;
"sin" - sine;
"cos" - cosine;
"tan" - tangent;
"asin" - arc sine;
"acos" - arc cosine;
"atan" - arc tangent;

Example. Setting thresholds for a sensor with analog output with ElementID=22:

$ snmpset -v2c -cwrite 192.168.0.193 VUTLAN-SYSTEM-MIB::ctlAnalogLowAlarm.2 s "5" \
 VUTLAN-SYSTEM-MIB::ctlAnalogLowWarning.2 s "35" VUTLAN-SYSTEM-MIB::ctlAnalogHighAlarm.2 s "45"

VUTLAN-SYSTEM-MIB::ctlAnalogLowAlarm.2 = STRING: "5"
VUTLAN-SYSTEM-MIB::ctlAnalogLowWarning.2 = STRING: "35"
VUTLAN-SYSTEM-MIB::ctlAnalogHighAlarm.2 = STRING: "45"