Frigomar gateway (010010019) — Overview

This firmware makes Frigomar air-conditioning units part of the MUXEN boat.

A Frigomar unit keeps its own controller and its own cabin panel, and that panel can be read and written over a Modbus serial link: the cabin temperature it measures, the set point it is holding, the mode it is in, the fan speed, whether the compressor is running, and the fault and alarm words its power module reports.

This gateway polls that link and republishes each unit as one MUXEN HVAC device. One box serves up to four units, one per serial channel. From the boat's point of view there are four air conditioners on the MUXEN bus, each reporting its cabin temperature, its set point, its mode, its fan speed and whether it is running.

It commands the units

Read this before wiring anything. This gateway does not only watch:

• From a MUXEN screen it switches a unit on or off and writes its temperature set point, exactly as if the buttons had been pressed on the cabin panel.
• By itself, in automatic mode, it switches a unit off when the battery park it is bound to reports that the boat cannot afford it — overload, low battery, or a state of charge below MinSocToWork. It does not switch it back on when the battery recovers; that is a deliberate manual action.
• From a switch anywhere on the MUXEN bus. Each channel can be given a logic expression (RemoteCmdEqn) built from signals seen on the MUXEN bus — a Bloc 8 input, a Scheiber switch, a relay. Every time that expression goes true, the unit toggles on/off, like a wall switch.

Sending an explicit on or off command from the boat disables the automatic battery cut-off for that unit until an auto command is sent. See Commissioning.

What it is not

• It does not replace the Frigomar controller. The unit keeps its own panel, its own protections and its own compressor management; the gateway reads it and asks it for two things.
• It commands on/off and set point only. Operating mode, fan speed, sensor selection and the panel settings are read but never written — choose them on the unit's own panel.
• It publishes nothing for a unit that does not answer. A unit switched off at its breaker simply disappears from the boat's screens; see Common mistakes — Frigomar gateway.

Identity

	CAN/Modbus	CAN/Serial v2
Product ID	010010019	010010019
Hardware ID	990010053	990010063
Software ID	990050009	990050009
Version	5.9	6.4
Image	010010019-MODBUS-app_frigomar-firmware.srec	010010019-SERIAL-V2-app_frigomar-firmware.srec

Limits

Units per gateway	4 — one per serial channel
Units per channel	1
Serial link	Modbus RTU, 9600 baud, 8N1, RS-485 — fixed by the firmware
Published every	about 1 s per unit
Set point accepted	18…30 °C
Alarms carried at once	32

Read next

• What you need — what to order and how to wire it
• Commissioning — commissioning, and the first start
• Common mistakes — Frigomar gateway — what usually goes wrong
• Reference — Frigomar gateway — what it publishes, parameters, alarm codes
• CAN-SERIAL gateways — what is true of every gateway of this family