--- title: Saia S-Bus Ethernet slug: litmusedge/quickstart-guide/industrial-systems-connection-guide/saia/saia-s-bus-ethernet description: Review the following information for setting up and configuring the Saia S-Bus Ethernet driver. docTags: createdAt: 2026-10-14T18:41:28.071Z --- Review the following information for setting up and configuring the Saia S-Bus Ethernet driver. The driver communicates with Saia (SBC) PCD controllers using the Ether-S-Bus protocol over UDP. :::hint{type="info"} **Note:** This driver is experimental. Some features might not work as expected. ::: # Litmus Edge compatible series | Compatibility parameter | Compatible items | | ---------------------------- | ----------------------------------------------------------- | | **Driver type** | Ethernet (UDP) | | **Validated devices/series** | [Saia PCD series](https://www.saia-pcd.com/en-gb/products/) | To set up and configure this device in Litmus Edge (LE), do the following: - Step 1: Set up and configure the PLC device - Step 2: Set up the PLC device in Litmus Edge DeviceHub - Step 3: Configure the list of registers # Step 1: Set up and configure the PLC device If the device is configured for Ethernet access, find its network parameters. Otherwise, use PG5 v2.3.165 software on your computer to configure your device for Ethernet access. Record the S-Bus station number of the device. # Step 2: Set up the PLC device in Litmus Edge DeviceHub Configure the following parameters when you [Connect a Device](docId\:pF5pwEP7Ata1NC7c0yQu_) with this driver. Update default values to the specific setup of your device. | Parameter | Value | | ------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **Type** | SAIA | | **Driver** | Saia S-Bus Ethernet | | **NetworkAddress** | The IP address of the device you defined in Step 1. Default value `192.168.0.1` | | **NetworkPort** | The UDP port of the device. Enter a value from `0` to `65535`. Default value `5050` | | **StationID** | The S-Bus station number or slot number of the device. Enter a value from `0` to `255`. Default value `0` | | **UseFFPFloat** | Select this option to read and write floating-point values in the Saia Motorola FFP format instead of IEEE 754. Use it only for PCD controllers with legacy firmware. Default value: cleared | The following parameters are under **Advanced Parameters**. | Parameter | Value | | ----------------------- | ------------------------------------------------------------------------------------------------------------------- | | **ReadTimeout** | How long the driver waits for a response, in milliseconds. Enter a value from `10` to `10000`. Default value `2000` | | **RetryCount** | The number of times the driver retries a failed request. Enter a value from `0` to `5`. Default value `0` | | **PauseBetweenRetries** | The pause between retries, in milliseconds. Enter a value from `0` to `2000`. Default value `0` | For the **Meta Data**, **Status Register**, and **Optional Settings** options, see [Connect a Device](docId\:pF5pwEP7Ata1NC7c0yQu_). # Step 3: Configure the list of registers When you [Add a Tag](docId:89nruY50cZN0cPLIOmVdl) to the connected device, see the following register table and tag parameters. This driver does not support browsing tags. See the following additional resources if necessary: - [Organize Device and Tag Data by Using Metadata](docId\:gSM6iJPWjd0cCxWq2Qre2) - [Tag Formula Variables](docId\:Xj0OqYONxM2BEhMwqkDWC) ## Register table All addresses are decimal. For `Reg_Bit` and `DB_Bit`, the address is the register or DB address followed by a two-digit bit number, from `00` to `31`. For example, `Reg_Bit` address `1005` is bit 5 of register `10`. | **Name** | **Value Types** | **Access Type** | **Address Format** | **Min Address** | **Max Address** | **Description** | | -------- | --------------------------------------------- | --------------- | ------------------ | --------------- | --------------- | ------------------- | | Register | uint16, int16, uint32, int32, float32, string | R/W | DDDDD | 0 | 16383 | Register | | Counter | uint16, int16, uint32, int32 | R/W | DDDD | 0 | 1599 | Counter | | Timer | uint16, int16, uint32, int32 | R/W | DDDD | 0 | 1599 | Timer | | DB | uint16, int16, uint32, int32, float32, string | R/W | DDDDDDDD | 0 | 536016383 | Data block | | Flag | bit | R/W | DDDD | 0 | 8191 | Flag | | Output | bit | R/O | DDDD | 0 | 1023 | Output | | Input | bit | R/O | DDDD | 0 | 1023 | Input | | Reg\_Bit | bit | R/W | DDDDDdd | 0 | 1638331 | Bit in a register | | DB\_Bit | bit | R/W | DDDDDDDDdd | 0 | 2000000031 | Bit in a data block | ## Tag parameters - **Name**: Select a register name from the drop-down list. The available options depend on the names in the register table. - **Value Type**: Select a data type from the drop-down list. The available options depend on the register name selected. - **Address**: Enter the register address in decimal format, within the min and max range in the register table. Omit leading zeros. For `Reg_Bit` and `DB_Bit`, add the two-digit bit number at the end. - **Count**: Enter the number of values to read, starting at the configured address. A count higher than `1` returns an array of values. Default value `1` - **StrEncoding**: For the `string` value type only. Select the code page used to decode the string: **UTF-8**, **Shift-JIS**, or **Windows-1251**. Default value **UTF-8** - **PollingInterval**: Enter how often the tag polls for data, in seconds. Enter `0` to disable polling. Default value `1` - **Tag Name**: Enter a name for the tag. - **Description** (Optional): Enter a description for the tag. - **Tag Formula**: Enter a formula for the tag to process the generated data. You can use two variables: `value` (current tag value) and `timestamp` (current tag UNIX time in milliseconds). The following math functions are available: - sin - cos - sqrt - tan - power: power(`x`) performs the operation `10^x`. - log: log(`x`) is the natural logarithm (the logarithm is in base `e`). - exp: exp(`x`) performs the operation `e^x`. - **Only Publish on Change of Value**: Select the checkbox to publish NATS messages only when the *value* parameter changes. *Change of Value* only applies to boolean, numeric (such as int or float), and simple string data types. It does not apply to complex types, such as JSON or array. Poll-once topics are not affected by *Change of Value* settings, and still receive a single message. - **Meta Data**: Define key-value pairs to add to the device output payload. :::hint{type="info"} **Note:** If you use special characters in metadata key names, the special characters are replaced with underscore characters in the payload. This can cause two key names to be combined into one. For example, configuring the key names a\*\*b and a&\&b creates only one key name (a\_\_b). :::