Editing Eng-01.02. TCU-NG2 Operational Manual Rev(A)

= Glossary =
{| class="wikitable sortable"
! Term !! Description
|-
| SMI (Structure of Management Information) || Defines the rules for objects in MIB.
|-
| MIB (Management Information Base) || A database that contains information about managed devices.
|-
| OID (Object Identifier) || A unique numerical identifier given to each object.
|-
| NMS (Network Management System) || Used to receive and send information from the SNMP agents.
|-
| GET (gettable)/Walk (walkable) || The objects that can be queried using SNMP GET and WALK commands. These objects have read-only access.
|-
| SET (Settable) || The objects that can be set from NMS. These objects have read-write access.
|-
| Trap || A message sent by the SNMP agent (AQue) to the NMS.
|-
| Alarm || Status messages sent from the SNMP agent (AQue) to the NMS.
|-
| Varbinds (Variable Bindings) || Include additional information in the alert sent from the SNMP agent (AQue) to the NMS.
|}


'''Note:'''  
Not all objects in the MIB tree are SET-enabled due to risk of system reboot or instability. This functionality can be enabled on customer request. Objects in the *modules* branch are SET-enabled as threshold adjustments help in troubleshooting.

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= 1. Summary =
This document explains the purpose and layout of the PLC MIB, including:

* HVAC and Battery MIB structures  
* Trap OIDs and Varbinds  
* Event status and severity information  
* Floating multiplier usage  
* SNMP integration from the AQue frontend  

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= 2. Scope =
This document is intended for engineers, technicians, IT professionals, and NOC teams monitoring systems through SNMP.

It is assumed that users understand:

* SNMP Protocol  
* SNMP monitoring software (NMS)  
* MIB loading / walkthrough  
* SNMP configuration from AQue  

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= 3. Structure of PLC MIB =
PLC MIB begins with:

'''iso.org.dod.internet.private.enterprises.sitelogic'''  
OID: 1.3.6.1.4.1.45391

Explanation:

* 1 = ISO  
* 3 = ORG  
* 6 = DOD  
* 1 = Internet  
* 4 = Private  
* 1 = Enterprises  
* 45391 = PLC Enterprise  

After the PLC Enterprise ID, the MIB splits into four branches:

* info  
* settings  
* modules  
* systemNotifications  

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== 3.1. Info Branch ==
The info branch contains:

* systeminfo  
* hardwareInfo  

=== 3.1.1. systeminfo Branch ===
The systeminfo branch contains:

* site  
* system  
* version  
* network  

'''site''' (SET-enabled):  
Gives site name, ID, address, operator, latitude, longitude.

'''system''' (GET/WALK):  
Shows uptime, memory, and storage.

'''version''' (GET/WALK):  
Shows OS version, hardware model, software/hardware versions.

'''network''' (GET/WALK):  
Displays IP address, subnet mask, and gateway.

=== 3.1.2. hardwareInfo Branch ===
Contains:

* totalNoOfDevices  
* hardwareInstanceTable (GET/WALK)

hardwareInstanceTable includes:

* hardwareName  
* hardwareStatus  
* hardwareType  

Example: HVAC-1, HVAC-2, HVAC-3.

----

== 3.2. settings Branch ==
Contains:

* clientSettings  
* dateTimeSettings  
* snmpSettings  

'''clientSettings''' (SET):  
Name, username, contact.

'''dateTimeSettings''' (SET):  
Device date/time, timezone, NTP server.

'''snmpSettings''' (SET):  
Primary/secondary IPs & ports, server counts, agent ports, etc.

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== 3.3. modules Branch ==
Contains two subbranches:

* cooling  
* energy  

=== 3.3.1. cooling Branch ===
Contains:

* sitelogicModuleHvacMIB → hvac

==== 3.3.1.1. hvac Branch ====
Contains three tables:

* hvacHardwareInfoTable (GET/WALK)  
* hvacConfigurationsTable (SET + GET/WALK)  
* hvacAlarmTable (SET + GET/WALK)  

'''hvacHardwareInfoTable'''  
Includes: name, description, manufacturer, serial, etc.

'''hvacConfigurationsTable'''  
Includes SET objects:

* hvacConfigName  
* hvacConfigDescription  
* hvacConfigValue  
* hvacConfigHighThreshold  
* hvacConfigLowThreshold  

'''hvacAlarmTable'''  
Includes SET objects:

* hvacAlarmName  
* hvacAlarmDescription  
* hvacAlarmPolarity  
* hvacAlarmHighThreshold  
* hvacAlarmLowThreshold  

==== 3.3.1.2. HVAC Trap OID & Varbinds ====
; '''hvacDynaNotification'''  
: OID: .1.3.6.1.4.1.45391.50.70.1.1.6.0.1 
: Receives HVAC traps

'''Varbind list:'''

* eventSeverity  
* eventDescription  
* eventTime  
* eventStatus  
* siteName  
* siteId  
* deviceIpAddress  
* eventHardware  
* hvacIndex  

----

=== 3.3.2. energy Branch ===
Contains:

* sitelogicModuleBatteryMIB → battery

==== 3.3.2.1. battery Branch ====
Contains three tables:

* batteryHardwareInfoTable (GET/WALK)  
* batteryConfigurationsTable (SET + GET/WALK)  
* batteryAlarmTable (SET + GET/WALK)  

==== 3.3.2.2. Battery Trap OID & Varbinds ====
; '''batteryDynaNotification'''  
: OID: .1.3.6.1.4.1.45391.50.75.5.1.4.0.1 
: Receives Battery traps

'''Varbind list:'''

* eventSeverity  
* eventDescription  
* eventTime  
* eventStatus  
* siteName  
* siteId  
* deviceIpAddress  
* eventHardware  
* batteryIndex  

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== 3.4. systemNotifications Branch ==
Contains:

; '''systemNotification'''  
: OID: .1.3.6.1.4.1.45391.110.0.1  
: Receives system alerts such as memory full.

'''Varbinds:'''

* eventDescription  
* eventStatus  
* eventSeverity  
* eventTime  
* eventHardware  

'''Event Status Table'''

   {| class="wikitable"
   ! Value !! Status
   |-
   | 0 || alarmClose
   |-
   | 1 || alarmOpen
   |}

'''Event Severity Levels'''

{| class="wikitable"
! Level !! Value
|-
| urgent || 0
|-
| critical || 1
|-
| major || 2
|-
| minor || 3
|-
| warning || 4
|-
| clear || 5
|-
| notification || 6
|}

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= 4. Floating Multiplier Settings =
SNMP cannot directly handle decimal values.

To handle this, PLC MIB uses two float multipliers:

{| class="wikitable"
! Multiplier !! Description
|-
| '''Float1 = Value × 10''' || For one-decimal values  
Objects:  
* hvacConfigValue  
* hvacAlarmValue  
* batteryConfigValue  
* batteryAlarmValue  
|-
| '''Float100 = Value × 100''' || For two-decimal values  
|}

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= 5. AQue SNMP Configuration =
Steps:

# Load the MIB file in your NMS.  
# Log in to AQue (Default: admin / password).  
# Go to **Settings → General → SNMP**.  
# Configure:  
   * SNMP Agent  
   * SNMP Trap  

Supported versions:

* SNMP v2c  
* SNMP v3  
* Both  

After configuration, perform Walk/Get from NMS to verify.

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= 6. PLC Support =
If issues remain, contact PLC Support:

* 24/7 Support Phone: +1 855 752 4787  
* Support Email: support@plcgroup.com