Settings reference
Every setting you can change, what it does, what it defaults to, and which values it accepts.
This page lists every setting you can change, what it does, what it defaults to, and which values it accepts.
Where settings live
| Surface | What you can change there |
|---|---|
| Screen | Most operating settings, plus the screen's own brightness, timeout and language |
| Web interface | The same operating settings, in the Configuration tab |
| Modbus and BACnet | Everything, including the tuning parameters |
A setting changed on the screen or in the web interface is written to the controller and stored in its non-volatile memory. A setting changed over the fieldbus is only live in memory until it is saved — see Maintenance and updates.
Values in the tables below are given in the unit the controller uses.
Operation
| Setting | Web interface label | What it does | Default | Allowed values |
|---|---|---|---|---|
| Operating mode | Operation Mode | Standby, Automatic or Test | Standby | Standby, Automatic, Test |
| Number of tubes | Modbus only | Number of atomisation stages the unit has | 4 | 0–4 |
| Master enable | — | Read-only. Active when the master-enable input is active | — | — |
| Hygrostat | — | Read-only. Active when the hygrostat input is active | — | — |
| Airflow | — | Read-only. Active when the airflow input is active | — | — |
Demand and humidity
| Setting | Web interface label | What it does | Default | Allowed values |
|---|---|---|---|---|
| Demand input mode | Demand input mode | Where the demand comes from | 0-10V demand | 0-10V demand, 4-20mA demand, On/Off, External demand register, Return humidity voltage, Return humidity current |
| Desired return humidity | Return humidity setpoint | Setpoint used in the two return-humidity modes. Settable from the screen, the web interface and the fieldbus. The web interface only shows the field when the demand source is one of those two modes | 0 % | 0–100 % |
| External demand | — | Demand written from the fieldbus; only used with External demand register | 0 % | 0–100 % |
| Measured output humidity | — | Read-only humidity behind the unit, used by the limiter | — | — |
| High-limit transmitter threshold | Highlimit transmitter threshold | Output humidity above which the limiter cuts the demand | 60 % | 0–100 % |
| High-limit transmitter gain | Highlimit transmitter gain | How sharply the limiter cuts the demand | 7.0 | any value |
Water quality
| Setting | Web interface label | What it does | Default | Allowed values |
|---|---|---|---|---|
| Water temperature threshold | Water temperature threshold | Water temperature above which the water-temperature alarm is raised | 20 °C | 0 °C and above |
| Conductivity threshold | Conductivity threshold | Conductivity above which the conductivity alarm is raised | 40 µS/cm | 0 µS/cm and above |
Flushing
| Setting | Web interface label | What it does | Default | Allowed values |
|---|---|---|---|---|
| Flush interval | Flush interval | Hours between automatic flush cycles | 24 h | 0–48 h |
| Flush duration | Flush duration | Seconds each valve is held open during a flush | 30 s | 0–300 s |
| Next flush in | — | Read-only countdown to the next flush | — | — |
Outputs
| Setting | Web interface label | What it does | Default | Allowed values |
|---|---|---|---|---|
| Status output mode | Status output mode | Whether the status relay rests open or closed | Normally Open | Normally Open, Normally Closed |
| Alarm output mode | Alarm output mode | Whether the alarm relay rests open or closed | Normally Open | Normally Open, Normally Closed |
| Aux 1 contact mode | Aux 1 contact mode | Whether auxiliary 1 rests open or closed | Normally Open | Normally Open, Normally Closed |
| Aux 2 contact mode | Aux 2 contact mode | Whether auxiliary 2 rests open or closed | Normally Open | Normally Open, Normally Closed |
| Aux 1 alarm mask | Aux 1 alarm mask | Which alarms switch auxiliary 1 | none selected | any combination of the 16 alarms |
| Aux 2 alarm mask | Aux 2 alarm mask | Which alarms switch auxiliary 2 | none selected | any combination of the 16 alarms |
| Analog output | Analog output | What the 4–20 mA output carries | Demand input pin | Demand input pin, External demand, Output humidity, Return humidity, Demand (post limiter), Water pressure (pre pump), Water pressure (post pump) |
Network
| Setting | Web interface label | What it does | Default | Allowed values |
|---|---|---|---|---|
| DHCP | DHCP | Get the address from the network instead of using a fixed one | off | on / off |
| Static IP | Static IP | The fixed address to use | 192.168.1.195 | any IPv4 address |
| Subnet | Subnet prefix | The subnet, as a prefix length | 24 | 0–32 |
| Gateway | Gateway | The default router | 192.168.1.1 | any IPv4 address |
Fieldbus
| Setting | Web interface label | What it does | Default | Allowed values |
|---|---|---|---|---|
| RS-485 protocol | RS485 protocol | What the fieldbus carries | Modbus RTU | Modbus RTU, BACnet MS/TP |
| RS-485 baud rate | RS485 baud rate | Speed of the RS-485 bus | 115200 | 9600–115200 |
| BACnet/IP port | BACnet/IP port | UDP port for BACnet/IP | 47808 | 0–65535 |
| BACnet MS/TP MAC | BACnet MS/TP MAC | Node address on the BACnet MS/TP bus | 1 | 0–127 |
| BACnet device ID | BACnet device ID | Device instance number, used by both BACnet/IP and BACnet MS/TP | 1 | any value |
| Modbus ID | Modbus ID | Node address on the Modbus bus | 1 | 1–247 |
| Modbus port | Modbus port | TCP port for Modbus/TCP | 502 | 0–65535 |
Test and maintenance
| Setting | Where | What it does | Default | Allowed values |
|---|---|---|---|---|
| Test run demand | Screen, Modbus | Demand used while in Test mode | 100 % | 0–100 % |
| Test run duration | Screen, Modbus | Seconds the test runs before the unit returns to Standby | 1800 s | any value |
| Maintenance | Modbus | Acknowledges that maintenance has been done. Resets the pump-hours counter and restarts the one-year countdown | not set | set to 1 |
Tuning parameters
These are not on the screen or in the web interface. They are set over Modbus and BACnet.
Control loop
| Setting | What it does | Default | Allowed values |
|---|---|---|---|
| PWM period | Length of the control cycle, in milliseconds | 10000 ms | 1–30000 ms |
| Pump spin-up time | Time the controller waits before it trusts the motor current reading, in milliseconds | 2000 ms | any value |
| P gain | Proportional gain of the return-humidity loop | 1.0 | any value |
| P limit | Limit on the contribution of the P term | 1.0 | any value |
| I gain | Integral gain of the return-humidity loop | 0.0 | any value |
| I limit | Limit on the contribution of the I term | 1.0 | any value |
| D gain | Derivative gain of the return-humidity loop | 0.0 | any value |
| D limit | Limit on the contribution of the D term | 1.0 | any value |
| Max off cycles | Number of cycles with a control output of zero before the integrator is reset | 0 (disabled) | any value |
| Valve 1 hysteresis | Keeps valve 1 at its minimum duty cycle until the demand drops below the start threshold minus this value | 0.0 | 0–1 (0–100 %) |
Valve steps
Each of the four valves has four settings. The values are fractions of the demand:
0.1 means 10 %.
| Setting | What it does | Valve 1 | Valve 2 | Valve 3 | Valve 4 |
|---|---|---|---|---|---|
| Lower level | Demand at which the valve starts to open | 0.1 | 0.5 | 0.0 | 0.0 |
| Upper level | Demand at which the valve is fully open | 0.5 | 1.0 | 0.0 | 0.0 |
| PWM start | Smallest duty cycle the valve uses | 0.2 | 0.2 | 0.2 | 0.2 |
| PWM end | Largest duty cycle the valve uses | 0.8 | 0.8 | 0.8 | 0.8 |
A valve whose lower level is equal to or higher than its upper level never opens, and is skipped during flushing.
Conductivity probe
| Setting | What it does | Default | Allowed values |
|---|---|---|---|
| Probe cell constant | The probe's cell constant, in 1/cm | 1.0 | any value |
| Probe temperature coefficient | The probe's temperature coefficient, in %/°C | 0.02 | any value |
| Probe offset | A static offset added to the measured conductivity, in µS/cm | 0.0 | any value |
| Probe NTC resistance | The probe's NTC resistance at 25 °C | not set | any value |
| Probe NTC B value | The probe's NTC B value | 3850 | any value |
| Prefer low measurement path | Biases the first measurement after start-up towards the low range | off | on / off |
Screen settings
These live in the screen itself and are not stored in the controller.
| Setting | Where | What it does | Default | Allowed values |
|---|---|---|---|---|
| Brightness | Settings → Display Settings | Screen backlight level | 100 % | 10–100 % |
| Display timeout | Settings → Display Settings | How long the screen stays on when idle | 5 min | Never, 30 sec, 1 min, 2 min, 5 min, 10 min, 30 min, 1 hour |
| Language | Settings → Display Settings | Screen language | English | English, Nederlands, Français, Deutsch, Español |
Settings that are fixed in the firmware
These values are not adjustable. The two pressure thresholds are part of the pump's safety behaviour, so they are deliberately not exposed as settings.
| Value | Threshold |
|---|---|
| Inlet pressure alarm | 0.5 bar |
| Pump pressure alarm | 7.0 bar |
Retired settings
| Setting | What happens |
|---|---|
Measured output humidity enable (register 109) | Retired. The firmware always reads the high-limit transmitter, and writes to this register have no effect |
Settings that are read-only
These values are measured or counted by the controller. You can read them, but you cannot write them (except where noted).
| Web interface label | What it is |
|---|---|
| Demand input pin | The demand read from the analogue input |
| Master enable, Hygrostat, Airflow | The state of the three enable inputs |
| Pump, Pressure low, Pressure high | Pump state and the two pressure readings |
| Motor current | The measured motor current |
| Motor temperature | Whether the motor is over temperature |
| Water temperature, Board temperature | The two temperature readings |
| Conductivity | The measured water conductivity |
| Analog out | The value currently on the 4–20 mA output |
| Valve 1–4, Flush valve | The open/closed state of each valve |
| Flush input | Whether the external flush input is active |
| Total pump hours, Pump hours left, Maintenance in | Maintenance counters |
| Motor starts, Valve 1–4 starts, Flush valve starts | Start counters |
| Tubes, Reboots | Unit configuration and the boot counter |
| Active alarms, Alarm log | The alarm state and the alarm history |
Next steps
- Status and alarms — what each alarm means and what to do.
- Maintenance and updates — how to save and restore settings.