Stations
Station definitions to be used for TAGs. Contains connection parameters such as IP address, rack no, slot no.
Device and Station Relationship
Device: General device type definition (e.g: "Siemens S7-1500")
Station: Specific connection point
Example for Siemens: "Name: S7_1500_Main_Station, IP: 192.168.1.100, Rack:0, Slot:1"
Example for Modbus: "Name: Modbus_Energy_Meter, IP: 192.168.1.50, Node:1"
Station Fields
| Field Name | Description | Status | Example |
|---|---|---|---|
| Station Name | Unique station name | Required | E.g: "Compressor_Unit_1" |
| Device | Connected device | Required | Selected from Device list |
| IP Address | Station IP address | Required | 192.168.1.100 |
| Rack Number | PLC rack number | Required(For Siemens) | 0 |
| Slot Number | CPU slot number | Required(For Siemens) | 1 or 2 |
| Node ID / Unit ID | Modbus slave ID | Required(For Modbus) | Between 1-247 |
Adding New Station
Step by Step Station Addition
- Prerequisite: The relevant Device definition must be made
- Go to Station List page: Select "Management" → "Stations" from the left menu
- Click Add New Station button
- Device Type: Select the relevant Device type from the dropdown
- Select Device: Select the relevant Device from the dropdown
- Enter connection information: Station Name, IP Address, Rack Number and Slot Number (for Siemens) or Node ID/Unit ID (for Modbus)
- Test Connection: Test the connection (optional but recommended)
- Save: Click the "Save" button
Siemens Station Configuration
Example Siemens S7 Station Settings
Pay attention to the following parameters when defining Stations for Siemens PLCs:
IP Address: IP address of the PLC's Ethernet module
Rack Number: Usually 0
Slot Number: S7-300: Usually 2, S7-400: Usually 2 or 3, S7-1200/1500: Usually 1
Siemens Connection Checklist
- Make sure the PLC is in RUN mode
- "Optimized Block Access" should be off in TIA Portal (for data reading)
- "PUT/GET" communication must be active in the PLC
- Test network connection with ping
- Check firewall settings (port 102 must be open)
Modbus Station Configuration
Modbus TCP/IP Station Settings
IP Address: IP address of the Modbus slave device
Node ID / Unit ID: Slave device ID (between 1-247, usually 1)
Note: Some devices may use different port numbers, check device documentation.
Common Issues
Station Cannot Connect
- Check IP address and port number
- Check that Device definition is correct
- Test network connection (ping)
- Verify Rack and Slot numbers (for Siemens)
- Check that Node ID/Unit ID is correct (for Modbus)
- Check firewall rules. Required ports need to be opened.
Intermittent Connection Drops
- Check network stability
- Check PLC CPU load
- Increase timeout settings
- Reduce number of simultaneous connections
- Check network switch and cable quality
Best Practices
- Name stations to indicate location and purpose
- Add detailed description for each station (building, floor, line information)
- Document IP address changes
- Make station-based TAG organization