> For the complete documentation index, see [llms.txt](https://wiki.inels.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.inels.com/inels-bus/inels-design-manager-idm3/idm3-system-manager-reference.md). # System manager *Part 3 — Reference.* **Managers** ribbon tab → **System manager** *** ## 20.1 What lives here Everything the central unit runs internally, rather than on the bus. Seven tabs, each showing how many items you have used against the CU maximum: | Tab | Contents | Limit | | ------------------- | ------------------------------ | ----- | | **Timers** | Countdown timers | 64 | | **Counters** | Event counters | 64 | | **Heat/Cool areas** | Heating and cooling regulators | — | | **System programs** | Time programs | — | | **System devices** | | — | | **System bits** | True/false storage | 500 | | **System ints** | Numeric storage | 500 | > **This is where several "missing" managers went.** Time programs, heating programs and system devices are all here, not on separate ribbon buttons. *** ## 20.2 Timers Range **0.0 s to 24 hours**, up to **64**. | Field | Meaning | | ------------------- | --------------------------------------------- | | **Name** | | | **Timer value** | The value whose elapse raises `Timer elapsed` | | **Tick interval** | The time base for `Timer tick` | | **Automatic reset** | Return to zero on reaching the value | | **Automatic stop** | Stop on reaching the value | | Autoreset | Autostop | Behaviour | | --------- | -------- | -------------------------------------------- | | off | off | keeps counting past the value | | off | on | stops at the value | | on | off | resets and keeps running — a repeating cycle | | on | on | resets and stops — **the usual one-shot** | Actions: `Timer tick`, `Timer elapsed`. Functions: `Timer start`, `Timer stop`, `Timer reset`, `Timer copy`. **`Timer start` on a running timer restarts it** — the basis of re-triggerable corridor lighting. See [Tutorial 8](/inels-bus/inels-design-manager-idm3/tutorial-timers-counters-and-conditions.md). *** ## 20.3 Counters Up to **64**, holding **0 to 4 294 967 295** (32-bit). | Field | Meaning | | ------------------- | --------------------------------------- | | **Name** | | | **Counter value** | The target for `Counter reached value` | | **automatic reset** | Zero the counter on reaching that value | Setting **Counter value** also tells the system that the `Counter reached value` action has a target. Actions: `Counter increase`, `Counter decrease`, `Counter reached value`, `Counter changed value`. Functions: `Counter increment`, `Counter decrement`, `Counter reset`, `Counter set value`, `Counter copy`. *** ## 20.4 System bits Up to **500**. One true/false each. | Field | Purpose | | -------------------------- | -------------------------------------------- | | **Name** | | | **non volatile** | Keep the value across a central-unit reboot | | **Alias:** | Alternative name for third-party integration | | **Add to iNELS 3 export:** | Expose to external systems | | **Read only:** | External systems may read but not write | Actions: `System bit true`, `System bit false`. Functions: `System bit set bit`, `System bit null bit`. > **Tick "non volatile" for anything a person set on purpose.** Holiday mode surviving a power cut is what makes a system feel reliable. *** ## 20.5 System integers Up to **500**. One number each. Same fields as system bits, plus an **Address** — an index starting from 0. Actions: `SysInt_Change`, `SysInt_ChangeUp`, `SysInt_ChangeDown`. Functions: `Sys int increment`, `Sys int decrement`, `Sys int copy`, `Sys int set`, `Sys int reset`. *** ## 20.6 System programs Time programs. **+** to add, then choose from **Select program type**: | Type | Shape | | -------------------------- | -------------------------------------------------- | | **Periodical** | A moment, repeating | | **Continuous** | One stretch between two dates | | **Two-state** | On/off stretches across a week | | **Heating/Cooling - week** | A weekly temperature plan, plus a holiday variant | | **Heating/Cooling day** | A single-day temperature plan, for public holidays | All programs act as **actors** with `Program value switch ON` and `Program value switch OFF`. ### Periodical | Field | Meaning | | ------------------------------ | -------------------- | | **Program name** | | | **Activation time/dispersion** | When it fires | | **Periodical settings** | Which days or months | | Mode | Repeats | Tick boxes choose | | ------------------- | ------- | ------------------ | | **Every week** | weekly | days of the week | | **Every month** | monthly | days of the month | | **Selected months** | daily | months of the year | > **At least one day or month must be ticked**, or the confirm button stays unavailable. ### Continuous **Program name**, **Start** date and **Stop** date. Switches ON at **00:00:00** on the start date and OFF at **23:59:00** on the stop date. ### Two-state A weekly on/off graph. Per day, up to **16 time stamps**: * **Mark** adds a single time stamp * **Mark** then **Window** adds a pair * drag a stamp's line, or click its time label and type * click below the stamps to set each stretch — **green is ON, red is OFF** **Right-click a day label** to copy: tick target days, or use **Working days**, **Weekend**, **All week**, then **Copy actual program**. ### Heating/Cooling programs Same graph, but each stretch carries a **temperature** rather than on/off. | Field | Meaning | | ----------------------------------------- | ----------------------------------------------------- | | **Program name** | | | **Default** | Baseline temperature wherever nothing else is set | | **Favorite1**–**Favorite4** | Four preset temperatures used across the whole system | | **Visible range Min view** / **Max view** | The graph's vertical scale | All temperatures accept **−40 °C to +200 °C in 0.1 °C steps**. Set a stretch's temperature by dragging its horizontal line, or right-click in the yellow area and choose **Default** or **Favorite1**–**Favorite4**. > **Time plans can be edited live.** After the first upload, change a plan and confirm with **✓** — no full re-upload needed. *** ## 20.7 Heat/Cool areas The heating and cooling regulators. **+** above the **Heat/Cool list** adds one. Three sub-tabs. ### Parameters | Field | Meaning | | ------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------- | | **Address** | Assigned by iDM3 | | **Description** | The area's name | | **Control type** | See below | | **Enable H/C hysteresis** | 0 to 50 °C in 0.01 °C steps — used by one-temperature control | | **Check the difference between temperature of heating and cooling** | `On` prevents heating and cooling running together when the heating target exceeds the cooling target; `Off` allows it | | **Plan-Heating** / **Plan-Cooling** | The weekly time plans | | **Holiday Plan-Heating** / **-Cooling** | | | **Public holiday Plan-Heating** / **-Cooling** | | | **Thermostat 1** … | Up to **6** per area, with **Add** and **Remove** | | **Thermostat 1 Page** | Which page a multi-page thermostat displays | | Control type | Behaviour | | -------------------------------------------- | -------------------------------------------------------- | | **User control heating / cooling** | The user switches mode from a controller input | | **H/C automatic control - two temperatures** | Separate heating and cooling targets; the system chooses | | **H/C automatic control - one temperature** | One target for both, switched by hysteresis | ### Online parameters Editable via the pencil icon. | Field | Meaning | | ------------------------------------------ | ------------------------------------------------------------------- | | **Maximal temperature** | Upper limit while heating | | **Antifreeze temperature** | Lower limit while heating | | **Restart regulator after closing window** | How long heating stays off after a window opens | | **Maximal close window time** | After this, an open window is ignored | | **Manual mode on time** | How long a manual override lasts, with its **Value** | | **Public holiday** | Dates using the public-holiday plan, with **Copy – Public holiday** | **Always set Antifreeze temperature.** It protects the building when everything else is wrong. ### Connections | Field | What to attach | | --------------------------------------------- | ------------------------------------------------ | | **Heating regulator** / **Cooling regulator** | Filled automatically if added via Device manager | | **Thermosensor** | The temperature input for this area | | **Critical temperature sensor** | Floor-heating limit sensor | | **Heating output** | This area's valve or actuator | | **Heating supply** | The shared boiler demand | | **Cooling output** / **Cooling supply** | The cooling equivalents | **Minimum for heating only:** heating time plan, heating regulator, heating output, heating supply. **For both:** all eight. ### Regulator parameters Clicking **Heating regulator** or **Cooling regulator** opens its own **Parameters** (Address, Description) and **Online parameters**: | Field | Meaning | | -------------------------------------- | --------------------------------------------------------------- | | **Hysteresis** | Dead band preventing rapid switching | | **Source delay switch time** | Delay before firing the boiler after the valve is asked to open | | **Critical temperature** | Floor-heating limit — choose **Not Configuration** to ignore it | | **Hysteresis of critical temperature** | Dead band for the above | Full walkthrough: [Tutorial 6](/inels-bus/inels-design-manager-idm3/tutorial-heating-and-cooling.md). *** **Next:** [Chapter 21 — DALI](/inels-bus/inels-design-manager-idm3/idm3-dali-manager-reference.md).