Development Scope
Device and interface access
Check the PLC model, communication authorization, point table and access method, adapt the serial port or Ethernet collection interface, and configure the polling cycle and timeout of each device.
Product business functions
Implement multi-device polling, field mapping, status collection, alarm reporting, local caching and platform display according to the authorization agreement and point table.
Platform and data connection
Combine the business link of device and controller → collection or routing gateway → 4G link → enterprise platform → after-sales and operation and maintenance, and define the device identity, data fields, update time, abnormal status and result confirmation method.
Exception handling and operational constraints
The same PLC interface does not mean the same business protocol; write operations require separate confirmation of permissions, writable points, and production impact.
Data and Operational Workflow
PLC point reading → data type and rate conversion → gateway cache → 4G reporting → enterprise platform displays operating status, output and alarms.
The device side, communication side and platform side retain necessary status and logs respectively. Project integration testing is checked with actual equipment data and execution results, and network connection status and business completion status are recorded separately.
Project Inputs
- Existing device models, interface and wiring diagrams, licensing agreements, data samples and available codes.
- Business process and parameters: PLC model and point table, polling cycle, data type and write permissions.
- Target location, operator, SIM/APN, power supply, installation method and equipment size.
- Existing platform interfaces, user roles, development modules, number of prototypes and planned nodes.
Deliverables and Acceptance
| Deliverables | Delivery content | Verification method |
|---|---|---|
| product realization | Hardware design data, prototypes or existing equipment modification data involved in the project, as well as corresponding firmware and interfaces | Check raw registers point by point with platform readings. |
| Business integration testing | Data fields, status definitions, platform adaptation procedures and business integration testing records | Test multiple PLC polling, single device timeout and data update time. |
| Version and test data | Target hardware and software versions, build or deployment instructions, parameter configurations and test logs | Verify cache retransmission and duplicate record processing after communication recovery. |
First confirm the scope and key functions, then complete prototype or software development, system integration testing and stage acceptance. The acceptance conditions list the prototype, version, environment, duration and passing threshold; source code, design documents, third-party licenses, materials, traffic, cloud resources and on-site work are agreed separately.
Frequently Asked Questions
Can PLC of different brands be connected uniformly?+
The protocols for obtained data and access rights can be adapted separately, and then the device model can be unified. It is necessary to confirm the model, firmware, interface and data address one by one. You cannot judge that direct connection can be made based on "having a network port".
Can I only entrust some functions of the PLC data collection gateway?+
The device interface, terminal program, 4G communication and platform integration testing can be split based on the existing R&D foundation. Please provide existing information and target boundaries, first check the "PLC model and point table, polling cycle, data type and write permissions", and then clarify the deliverables and interface responsibilities of each module.
How are costs and cycle time assessed?+
Split the workload based on target devices, interfaces, existing data, and verification criteria. This project focuses on checking the PLC model and point table, polling cycle, data type and write permissions; when prototypes, on-site integration testing or third-party platform cooperation are required, the corresponding costs, prerequisites and nodes will be listed separately.
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