> For the complete documentation index, see [llms.txt](https://docs.flightsim-studio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flightsim-studio.com/e-jet-series/systems-guide/main-panel/integrated-electronic-standby-system-iess.md).

# Integrated Electronic Standby System (IESS)

![](https://cdn.document360.io/417c2d4d-fdb8-4d4d-b11d-011fe445d776/Images/Documentation/integrated-electronic-standby-system-iess-image-g7vps1km.png)

### BRIGHTNESS ADJUSTMENT BUTTONS

* Adjusts brightness

### AIRSPEED ROLLING DIGITS

* Indicates actual calibrated airspeed.

### ILS BUTTON

* <mark style="color:red;">Selects the display of ILS 1 deviations.</mark>

### REFERENCE BAROMETRIC PRESSURE INDICATION

* Indicates the barometric pressure as set by the barometric rotary knob.

### STANDARD BUTTON

* Sets the barometric pressure to standard atmospheric pressure.

### BRIGHTNESS CELL

* Automatically adjusts the instrument brightness according to the ambient lighting.

### ALTITUDE INDICATION

* Indicates actual altitude.
* Green hashed box appears on the left side of the numeric digits when altitude is below 10.000 ft.
* Minus (-) symbol appears on the left side when altitude is below sea level.

### BARO ROTARY KNOB

* Adjusts the barometric setting.

### CAGE BUTTON

{% hint style="info" %}
CAGE is not simulated. The button is modeled; it does not reset attitude or show a CAGE flag.
{% endhint %}

* <mark style="color:red;">Resets attitude to zero, eliminating accumulated drift when the button is pressed for more than 2 seconds.</mark>
* <mark style="color:red;">Must be used with wings levelled on stabilized flight conditions.</mark>
* <mark style="color:red;">When pressed an amber CAGE flag is displayed on the upper right corner for the IESS.</mark>

![](https://cdn.document360.io/417c2d4d-fdb8-4d4d-b11d-011fe445d776/Images/Documentation/integrated-electronic-standby-system-iess-image-ai7mnt7l.png)

### ROLL INDICATION AND SLIP/SKID INDICATION

* Indicates the bank angle of the airplane.
* Bottom half of the triangle indicates slip or skid angle if flight is not coordinated.

### AIRPLANE SYMBOL

* Reference for airplane attitude indication.

### VERTICAL SPEED

* Indicates the actual vertical speed (ft/min).
* Arrow indicates climb or descent.

### ILS DEVIATIONS

* <mark style="color:red;">Green diamond indicates glide slope and localizer position.</mark>

### Vmo/Mmo BARBER POLE

* Displayed when Vmo/Mmo is within the viewable range.

### METER ALTITUDE INDICATION

* Indicates the actual altitude in meters.

### PITCH ANGLE SCALE

* Provides a pitch angle indication between the airplane symbol and the horizon line.

### MACH NUMBER INDICATION

* Displays Mach speed.

### ALIGNMENT

* Takes about 90 seconds to align.

IESS refresh rate can be limited on EFB **Aircraft** → **Display Refresh Rate**.