Industrial Test Agents - Modbus, ProfiNet & Ethernet/IP
7 agents for PLC, SCADA, and fieldbus device validation. Serial, Ethernet, and interface protocols - some needing zero hardware.
OVERVIEW
Industrial automation networks run Modbus RTU over RS485, ProfiNet over Ethernet, Ethernet/IP across factory floors, and BACnet in building management systems - often on the same device. Validating a PLC or industrial gateway means testing it against each of these protocols with deterministic, repeatable stimulus that matches real-world conditions.
TestBot's industrial agents give you a Modbus server to simulate the PLC and a Modbus client to test the PLC directly - both over the same RS485 adapter. ProfiNet Master, Ethernet/IP Server, and BACnet IP Server agents run entirely over your PC's network card, with no hardware purchase required. The Ethernet Interface Agent uses an RPi-based jig to validate physical link behaviour: link up/down events, DHCP lease acquisition, VLAN tagging, and speed negotiation.
Industrial Testing Capabilities
Production-grade agents that map directly to real PLC, SCADA, and fieldbus validation requirements.
Modbus RTU & Modbus TCP
Read and write coils, holding registers, discrete inputs, and input registers. Run as Modbus Client (request sender) or Modbus Server (slave simulator) - or both in the same sequence over the same RS485 adapter.
ProfiNet IO Controller Validation
Act as a ProfiNet IO controller - discover IO devices, read input data, write output data, and validate cyclic communication timing. Runs over standard PC Ethernet, no specialised hardware required.
Ethernet/IP Adapter Simulation
Simulate an Ethernet/IP adapter (slave) device - validate scanners, PLCs, and industrial Ethernet controllers against a controlled virtual CIP node without real field hardware.
BACnet IP Device Simulation
Simulate a BACnet IP device for building automation validation - test HVAC controllers, lighting systems, and access control panels against a virtual BACnet node without physical building hardware.
Physical Ethernet Interface Testing
Bring Ethernet links up and down, force speed and duplex negotiation, start/stop DHCP server, set VLAN tags, and simulate cable faults - all via the RPi-based Ethernet Interface Jig connected directly to your device.
Profibus DP Slave Simulation
Simulate a Profibus DP slave node - validate Profibus masters, PLCs, and fieldbus controllers against a virtual slave without physical fieldbus hardware on the bench.
Typical Industrial Test Scenarios with TestBot
Real-world validation tasks mapped to the agents that automate them.
| Test Scenario | Agents Used | Validated Outcome |
|---|---|---|
| PLC Read/Write Validation | Modbus Client Agent | All holding registers read and written correctly within 50ms response time |
| Modbus Slave Simulation for Gateway Test | Modbus Server Agent | Gateway correctly maps Modbus registers to cloud payload; all function codes handled |
| ProfiNet IO Device Validation | ProfiNet Master Agent | IO device discovered, cyclic data exchange confirmed, alarm handling verified |
| Ethernet/IP Scanner Test | Ethernet/IP Server Agent | Scanner successfully reads/writes adapter data; EtherNet/IP connection established within spec |
| BACnet Controller Integration | BACnet IP Server Agent | BACnet objects read by controller, COV notifications received, write priority array validated |
| DHCP & Link Failover Test | Ethernet Interface Agent | DHCP lease acquired within 5s, failover re-established within 10s after link drop |
| Endurance Fieldbus Test (72h) | Modbus Client Agent + Utility Agent | Zero communication errors, all register values within tolerance, timestamped HTML report generated |
Frequently Asked Questions - Industrial Agents
Yes. The Modbus Server and Modbus Client agents support both Modbus RTU (serial over RS485) and Modbus TCP (Ethernet). The transport is selected by configuration in the test block - no different agent required.
RELATED PAGES
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Ethernet/IP, ProfiNet, and BACnet agents need zero hardware - download and start testing today.