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SECS/GEM
SEMI E4 · E5 · E30 · E37
GEM300 capability catalog
E40 · E87 · E90 · E94 axes
Modbus
TCP · RTU · ASCII
Modbus/TCP Security
TLS 1.2 · 1.3 · X.509v3
MQTT for OPC UA PubSub
MQTT 5.0 · UADP
OPC UA Client
opc.tcp · UA Binary
OPC UA Server
opc.tcp · UA Binary
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SECS/GEM
Modbus
MQTT
OPC UA
Tools
Products
SECS/GEM
GEM300 capability catalog
Modbus
Modbus/TCP Security
MQTT for OPC UA PubSub
OPC UA Client
OPC UA Server
Licensing
Download
Purchase
Contact
Sign in
Start free evaluation
Modbus
Overview
Background
Overview
Data model and addresses
PDU, ADU and function codes
Modbus TCP
Serial line: RTU and ASCII
Modbus/TCP Security
PDComm Modbus features
Quickstart
Tutorials
Overview
Observe addresses and frames
A closer look at the first TCP exchange
The 19 function codes and diagnostics
RTU and ASCII communication
TCP-to-serial gateway
Modbus/TCP Security
Build a test workflow with the simulators
Diagnose failures and report them
Guides
Overview
The simulator GUI
Headless runs and scenarios
The MCP server
Configure serial ports
JSON command reference
Use the SDK from Qt and MFC
API reference
Overview
Troubleshooting
Overview
Exception responses
Service errors and timeouts
Serial communication problems
Security connection problems
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PDComm.Modbus
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