Discrete sensors

Owned by Technical Service Specialist
Last updated: Oct 27, 2023 by Vladimir Tayzhev
2 min read

Parameters of sensors with a discrete output of the VUTLAN device can be located depending on their physical location in the sub-branches:

  • ctlInternalSensors - main system sensors;

    • ctlInternalSensorsDiscretsTable;

  • ctlCANSensors - CAN bus sensors;

    • ctlCANSensorsDiscretsTable;

  • ctlRsSensors - serial port sensors;

    • ctlRsSensorsDiscretsTable;

Example. Viewing discrete sensors:

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

 

SNMP table: VUTLAN-SYSTEM-MIB::ctlInternalSensorsDiscretsTable Id Module Num Type Name State Value Reset Level Reverse Specific 101001 2004 1 "dry" "Dry-1" "normal" 1 60 50 1 "" 101002 2004 2 "dry" "Dry-2" "normal" 1 60 50 0 "" 101003 2004 3 "dry" "Dry-3" "normal" 1 60 50 0 "" 101004 2004 4 "dry" "Dry-4" "normal" 1 60 50 0 "" 102001 2002 1 "door" "Analog-1" "normal" 1 60 50 0 ""

The location of the sensor in the system is determined by the module identifier Module in which this sensor is physically located and with the port number in the unit - Num.

Sensor with a discrete output may only in states:

  • 'normal'

  • 'alarm'

  • 'not connected'

If necessary, the inversion is performed by setting the state '1' in a field Reverse (default '0').

Sensor readings are in the field Value and can take values '1', or '0'

Example. Setting up an inversion of the sensor with a discrete output ID=101004:

$ snmpset -v2c -cwrite 192.168.0.193 VUTLAN-SYSTEM-MIB::ctlInternalSensorsDiscretReverse.101004 i 1

 

Reset smoke detectors

For smoke detectors on the CAN bus (VT460 sensor), a reset of the alarm state via the SNMP SET command is available. To do this, write the string value "reset smoke" (without the quotes) by the OID .1.3.6.1.4.1.39052.6.1.1.11 (ctlCANSensorsDiscretSpecific) with the sensor ID.

Other smoke sensors are reset by the SNMP SET command by controlling the state of the "Analog Power" switch, you must turn it off for 15 seconds and then turn the power back on. Read more about the relay here.