Salda RIS 700 VE EKO 3.0 RVP 485P

Installation

1. 1Connect the ModbusCloud gateway (MCG or MLP series) to the RVP 485P module via a shielded twisted pair RS-485 cable, wiring A to A and B to B terminals.
2. 2Set the Modbus slave address on the RVP 485P controller to match the address configured in the ModbusCloud template, typically address 1 if only one unit is on the bus.
3. 3Confirm the communication settings on the RVP 485P are set to 19200 baud, odd parity, and 8 data bits, matching the template defaults.
4. 4Import the Salda RIS 700 VE EKO 3.0 template from the ModbusCloud library into your gateway configuration.
5. 5Power on the air handling unit, verify that register values such as exhaust temperature and fan status appear correctly on the ModbusCloud dashboard.
6. 6Terminate the RS-485 bus with a 120 ohm resistor at the last device if the cable run exceeds 10 meters or if communication errors occur.

Things to watch for

01

Why do read and write registers both start at address 0?

The Salda RVP 485P uses separate Modbus function code ranges for reading and writing. Input registers (function code 4) and holding registers (function code 3 or 6/16) occupy independent address spaces. The template already accounts for this, so no manual adjustment is required.

02

What baud rate and parity settings should I use?

The RVP 485P requires 19200 baud with odd parity (8 data bits, 1 stop bit). If these settings do not match on the gateway side, the device will not respond to Modbus requests.

03

The gateway cannot communicate with the unit. What should I check?

Verify RS-485 wiring polarity (A to A, B to B). Confirm the slave address on the RVP 485P matches the template configuration. Ensure baud rate and parity are set to 19200 and odd on both sides. Add a 120 ohm termination resistor if the cable length is long.

04

Can I control multiple Salda AHUs on the same RS-485 bus?

Yes. Assign a unique Modbus slave address to each RVP 485P module and duplicate the template in ModbusCloud with the matching address for each unit. Keep total bus length within RS-485 limits and terminate both ends of the bus.

Registers (8)

6 read / 2 write

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