Unable to Recharge the prepaid meter

Solution: Connectivity Check: Confirm the meter is successfully communicating with the server. Serial Number Verification (SmartComm): Access the SmartComm Customer Master and ensure the serial number recorded matches the physical serial number of the connected meter. Duplicate Configuration Check: Verify that no two meters are incorrectly configured with the exact same serial number in the system.

Email Configuration SMTP Details Outlook

Solution: SMTP Host/Server Name: For Outlook.com: smtp-mail.outlook.com For Office 365/Microsoft 365: smtp.office365.com SMTP Port:587 (recommended) Encryption Method: STARTTLS Authentication: Your email account needs to be authenticated, so enable login or use the ""My outgoing server (SMTP) requires authentication"" option in your email client. Username: Your full Outlook email address (e.g., yourname@outlook.com or yourname@domain.com) Password: Blank

Email Configuration App Password creation for Gmail account

Reason - Gmail will work only with a secure encrypted app password Solution: Go to your Google Account settings. Navigate to the Security tab. If you don't have it enabled, turn on Two-Step Verification. Find and click on App passwords. Select an app name (like ""SMTP"" or ""Mail Client"") and click Generate. Copy the generated 16-character password and use it in your mail client's password field instead of your main Gmail password.

Email Configuration SMTP Details Gmail

Solution: Gmail SMTP Settings SMTP Server: smtp.gmail.com Port: 587: (requires STARTTLS/TLS) 465: (requires SSL) Authentication: Required Username: Your full Gmail address (e.g., user@gmail.com) Password: An App Password generated from your Google Account security settings Security/Connection: TLS or SSL, depending on the port chosen

Transfer existing sensor to a different gateway

Reason - Loss of old data stored under device id created Solution: To prevent data loss, edit the sensor and use the "Move to Gateway" option to transfer the sensor to a different gateway.

Asset list is not available in the filter

Reason - The asset is not assigned to the organization Solution: Check the asset selection settings in organization settings

Reason - Sensor/gateway limit exceeded Solution: Check license information for sensor/gateway limit

Cannot change the ip address of gateway

Reason - The ip address should is not available Solution: 1. if company network is being used check the accesibility to access 2. check if set ip is with in subnet range 3. Check if Primary and Secondary DNS is correct as per network settings 4. Set the Default Gateway IP to match the router's IP or the company network's default gateway IP.

3rd part meter not communication

Reason - 1. Memory map configuration wrong 2. (10 power -4 )Conversion factor is not available in third party memory map configuration 3. Data on modscan and software is matching but not matching with meter display readings Solution: 1. Verify data via Modscan, check wiring, confirm the meter parameter's datatype/function code in the memory map, and ensure the gateway supports that parameter datatype. 2. Can be added from conversion factor available in Master settings

Could not download certificate

Reason - All mandatory fields are not saved in organisation info settings Solution: All details should be given in mandatory field of organisation settings

Comparative energy insights in DIN Meter WD4000 Series

Updated: Aug 21, 2026 | 6 min read

Technical Articles

Published: Jul 14, 2026 by Divyesh B. Vaghasiya

Technical Articles

Click on any topic to jump to that section

WD4000 series energy meter is a DIN based energy monitoring device that helps in monitoring energy consumption at the point of installation. It helps to keep a tab on the consumption of energy guzzling devices for the user to take corrective actions.

The whole current 1 Phase energy meter (5-40 A) in 2 module or 3 Phase (10-60 A) in 7 module size has a powerful comparative insight that shows today’s consumption compared to yesterday and this month consumption compared to previous month.

Quick monitoring of daily, weekly & monthly consumption compared to previous period

This means that for monitoring previous month data, we have the convenience to see the data anytime during the current month. This is an inbuilt feature without the use of any software. This comparative insight aspect at an extremely competitive price in this multifunction meter is a mighty combination that customers can experience.

Moreover, there is also a variable period i.e ‘push to push’ for the user’s convenience. The push button is used for measuring kWh consumption from one push of the button to next time push i.e from one period to another period. The energy meter also has a non-resettable energy register for all audit purposes.

Typical usages are energy guzzlers like AC’s at home or office, standalone machines in plants, etc. It can also be used for check monitoring of room-based energy consumption in hostels or organisation’s residential quarters for currents as low as 0.02A (1Ph) / 0.04A (3Ph).

For a comprehensive energy management system, it is recommended to connect these meters with a communication RS485 module to L&T E&A SmartComm EMS for ready to use reports, trend analysis, reports by email and analytics using SmartComm EMS.

Parameters		3-Phase Meter	1-Phase Meter
Instantaneous Parameters	Phase voltage	✓	✓
	Phase current	✓	✓
	Power Factor	✓
	Active power	✓	✓
	Reactive power	✓
	Apparent power	✓
	Frequency	✓
Maximum Demand	Present month	✓
Maximum Demand	Previous month	✓
kWh Consumption	Total	✓	✓
	Present day	✓	✓
	Present week	✓	✓
	Present month	✓	✓
	Push-to-push	✓	✓
	Previous day	✓	✓
	Previous week	✓	✓
	Previous month	✓	✓

Parameters		3-Phase Meter	1-Phase Meter
Instantaneous Parameters	Phase voltage	✓	✓
	Phase current	✓	✓
	Power Factor	✓
	Active power	✓	✓
	Reactive power	✓
	Apparent power	✓
	Frequency	✓
Maximum Demand	Present month	✓
Maximum Demand	Previous month	✓
kWh Consumption	Total	✓	✓
	Present day	✓	✓
	Present week	✓	✓
	Present month	✓	✓
	Push-to-push	✓	✓
	Previous day	✓	✓
	Previous week	✓	✓
	Previous month	✓	✓

Energy consumed by a particular load or set of loads for a specific application can be monitored using L&T’s DIN Energy meters.

Push to push consumption helps to monitor energy for flexible time period in hours or days or months.
Non resettable cumulative energy registers and another register for push to push consumption.

This gives an insight of how much energy is consumed for a specific time period or for a particular activity.

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About the Author

Divyesh B. Vaghasiya,

Senior Product Management and Marketing professional

Divyesh B. Vaghasiya is a Senior Product Management and Marketing professional focused on Industrial IoT, Energy Management, and Smart Technologies. With 13+ years of experience in the electrical and automation industry, he combines deep technical knowledge with strategic business thinking. He shares perspectives on emerging technologies, product management, sustainability, and digital transformation, helping businesses navigate the evolving energy landscape.