Modbus Monitoring Made Simple
Connect Modbus RTU and Modbus TCP devices to real-time cloud dashboards via IoT gateways. Monitor industrial equipment with smart alerts and mobile access — no complex SCADA setup required.
What is Modbus monitoring?
Modbus is one of the most widely used communication protocols in industrial automation. Developed in 1979, it remains the standard way that PLCs, variable frequency drives (VFDs), sensors, and industrial instruments exchange data. Millions of devices worldwide speak Modbus.
Modbus monitoring means reading data from these devices and presenting it in a way that operators, engineers, and managers can understand and act on. Instead of walking to a control panel or connecting a laptop to a serial port, you get real-time dashboards accessible from any web browser.
Logable bridges the gap between Modbus devices and the cloud. An IoT gateway on your local network reads Modbus registers and publishes the data to Logable over MQTT. From there, you get live dashboards, historical trending, smart alerts, and mobile access — all the capabilities of a modern monitoring platform, connected to your existing Modbus infrastructure.
Modbus RTU vs Modbus TCP
Both protocols are fully supported through IoT gateways. Here is how they compare.
| Feature | Modbus RTU | Modbus TCP |
|---|---|---|
| Physical Layer | RS-485 serial (wired) | Ethernet / Wi-Fi |
| Speed | Up to 115.2 kbps | 10/100/1000 Mbps |
| Distance | Up to 1,200m (RS-485) | Standard network reach |
| Addressing | Unit ID (1–247) | IP address + Unit ID |
| Common Use | Legacy devices, field instruments | Modern PLCs, VFDs, meters |
How Logable connects Modbus devices
A gateway-based architecture keeps your Modbus devices secure while giving you full cloud visibility.
Modbus Device
RTU or TCP
IoT Gateway
Protocol bridge
MQTT Transport
TLS encrypted
Logable Platform
Dashboards & alerts
The IoT gateway polls Modbus registers at your configured interval (typically 1–10 seconds), maps register values to meaningful metrics, and publishes them to Logable over MQTT. Your Modbus devices never touch the internet directly.
Dashboard visualizations for Modbus data
Transform raw register values into actionable operational dashboards.
Real-Time Dashboards
Live-updating charts, gauges, and industrial widgets display your Modbus data as it arrives. Build custom layouts with the drag-and-drop dashboard builder.
Smart Alerts
Configure threshold, status change, rate-of-change, and compound alert conditions on any Modbus register value. Get notified via email or in-app inbox.
Secure Transport
Data travels from your gateway to Logable over MQTT with TLS encryption. No inbound firewall ports required — the gateway initiates all outbound connections.
Structured Metrics
Each device type comes with predefined metric schemas. Modbus register values are mapped to meaningful metrics like weight, flow rate, RPM, and temperature.
Industrial device types supported
Logable supports a range of industrial device types commonly found on Modbus networks. Each device type comes with predefined metrics and dashboard widgets.
Silos
Fill level and weight monitoring for bulk storage
Conveyors
Belt speed, throughput rate, and totaliser tracking
Motors
RPM, power draw, temperature, and run status
Water Pumps
Flow rate, pressure, power, and efficiency
Scales
Weight measurement with stability and calibration
Flow Meters
Instantaneous and total flow with direction
Weigh Bins
Batch weighing with open/close state
Check Weighers
In-motion weighing and count verification
Frequently asked questions
Common questions about Modbus monitoring with Logable.
Modbus connectivity is handled via IoT gateways, not natively within the Logable platform. The gateway reads Modbus registers from your devices and publishes the data to Logable over MQTT. Logable natively supports MQTT and REST API for data ingestion.
Ready to bring Modbus data to the cloud?
Connect your first Modbus device via an IoT gateway in minutes. No credit card required.