RC1 Modbus Table
HUBBOX RC1 Relay Controller Modbus TCP Map
Developer-first, optimized Modbus TCP register map for direct integration of relay outputs and digital inputs into your OT/IT infrastructure using the RC1 Relay Controller.
Doc Version: 2314 | Date: 30.11.2025
| Type | Address | Data Type | Variable Name | Description | Access |
|---|---|---|---|---|---|
| Coils | |||||
| Coils | 1 - 8 | bool | Out1 - Out8 | Relay Outputs 1-8. Default: 0 | R/W |
| Discrete Inputs | |||||
| Discrete | 10001 - 10010 | bool | Input1 - Input10 | Digital Input Statuses 1-10 | R |
| Input Registers (Counters) | |||||
| Input | 30001 - 30018 | uint16 | Reserved | Reserved for future use | R |
| Input | 30019 - 30037 (Odd Addresses) | uint32 | Input1 - 10 RisingEdgeCount | Rising Edge Counters (Unit: pcs) | R |
| Holding Registers (Configuration) | |||||
| Holding | 40001 - 40002 | uint16 | HWVer, SWVer | Hardware (1) and Software (1) Versions | R |
| Holding | 40003 | uint16 | CommandReg | Command Register. 0: Success | R/W |
| Holding | 40004 - 40015 | uint16 | IP, SN, GW Addresses | Network Configuration Octets. e.g. IP: 192.168.24.251, Subnet: 255.255.255.0, Gateway: 192.168.24.254 | R/W |
| Holding | 40016 - 40021 | uint16 | MAC[5] - MAC[0] | MAC Address Octets | R/W |
| Holding | 40022 | uint16 | Inputs18Type | 0: OnlyInput, 1: Input&RelayDrive | R/W |
| Holding | 40023 | uint16 | Outs HoldEnable | 0: Outs Is Volatile, 1: Outs Is NonVolatile | R/W |
