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https://github.com/seikosantana/modbus-sim
A cross-platform Modbus server (slave) simulator with configurable rules for changing register values periodically for modbus-based development testing purposes.
https://github.com/seikosantana/modbus-sim
modbus simulator
Last synced: 4 days ago
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A cross-platform Modbus server (slave) simulator with configurable rules for changing register values periodically for modbus-based development testing purposes.
- Host: GitHub
- URL: https://github.com/seikosantana/modbus-sim
- Owner: seikosantana
- Created: 2023-01-19T05:11:34.000Z (about 2 years ago)
- Default Branch: main
- Last Pushed: 2023-01-19T05:34:19.000Z (about 2 years ago)
- Last Synced: 2024-11-27T16:42:34.837Z (2 months ago)
- Topics: modbus, simulator
- Language: C#
- Homepage:
- Size: 7.81 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
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README
# ModbusSim
A cross-platform Modbus server (slave) simulator with configurable rules for
changing register values periodically for modbus-based development testing purposes.
## Configuration
One purpose of this simple simulator is to simulate changing values on the server-side.
Configuration is done in the `appsettings.json` file.
### Modbus Settings
The `ModbusSettings` key in the JSON configures which port the server will be listening at,
and how many seconds an idle connection is timed-out.
```json
"ModbusSettings": {
"Port": 5502,
"ConnectionTimeoutSeconds": 60
}
```
### Rules
The `Rules` key in the JSON configures how holding registers will change values.
The `SimpleIncrementRules` is the only type of rule implemented for now, where
the register range defined between`StartReg` and `EndReg` inclusively will be
incremented until the `MaxValue`, and then will be reset to its `InitialValue`.
`EndReg` is optional. When `EndReg` is not defined, the rule applies only to the
register `StartReg`.
```json
"Rules": {
"SimpleIncrementRules": [
{
"StartReg": 1,
"EndReg": 10,
"InitialValue": 0,
"MaxValue": 4,
"DelaySeconds": 5
},
{
"StartReg": 11,
"EndReg": 20,
"InitialValue": 0,
"MaxValue": 2,
"DelaySeconds": 8
}
]
},
```
More type of rules will be implemented in the future, if necessary.
## Tips and Notes
- If `EndReg` is not defined, rule applies only to a register `StartReg`.
- If a register value should only be initialized, but not changing, set `MaxValue`
as in `InitialValue`
- The default configuration has `Port` set to 5502 to avoid `Permission Denied`. Most
modbus servers listens on port 502.
- Rules are checked and validated when ModbusSim starts. Any other rule validation
details can be seen on outputs or logs.