Compare the installations' hardware, software and idle behavior before changing a robot pendant screen timeout. Use only a documented setting or official support instructions, and do not treat a black screen as proof of energy savings or a safe machine state.
Investigate a robot pendant screen timeout by comparing the two installations, recording what happens during inactivity, and checking the documentation for their exact hardware and software. A display that turns black may be blanking normally, but appearance alone does not establish the cause or prove energy savings. Do not guess a menu path or copy settings from another robot until you know that the same function applies to both.
Match the symptom before changing settings
Start with the pattern, not the presumed fix. These symptoms suggest different checks:
- The screen becomes black after a repeatable idle interval and returns through the documented wake action: this is consistent with an inactivity-related display function, though its setting and purpose still need confirmation.
- The screen becomes black during active use: do not assume an idle timer. Record any accompanying messages, interruptions or changes in controller status.
- The image disappears but the display still appears illuminated: a black image and a switched-off backlight can look different. Visual inspection alone cannot establish the electrical state.
- The screen does not return through the documented wake action: treat this as a possible display, power or controller problem rather than simply a timeout setting.
- The display returns through a startup sequence: record that sequence. A restart is not the same behavior as restoring an idle display.
- Only one installation shows the behavior: compare equipment and software identifiers before concluding that a setting is missing.
A black pendant screen is not confirmation that the robot has stopped or that approaching it is safe. Use the installation's established safety procedures, not screen appearance, to determine the machine state.
Establish a safe comparison baseline
Make observations only under an approved procedure and in a machine state suitable for the check. Do not start a program or enter a hazardous area merely to investigate a display timer. If the observation would interfere with a task requiring the pendant, postpone it.
On the installation that already blanks its screen, record:
- The operating mode and controller status before the idle period.
- The last display interaction and the elapsed time until blanking.
- Whether any message or visible transition precedes the black screen.
- The documented action used to restore the display.
- Whether the original page returns or a startup sequence appears.
- Any associated alarms or recorded events.
Do not press an arbitrary key, enabling device or motion control to find out whether it wakes the screen. If the permitted wake action is unknown, get that instruction from the equipment documentation or official support first.
Repeat the observation only when it is safe and useful. A repeatable interval supports the timeout explanation; it does not identify the setting by itself.
Compare the installation details
Similar-looking pendants can belong to different controller generations or software configurations. Capture identifiers from equipment labels and documented information screens without opening enclosures or removing covers.
| Detail to record | Why it matters |
|---|---|
| Controller model and identification | Establishes which documentation and support instructions apply |
| Pendant model and identification | Distinguishes display and interface variants |
| Installed software version | Helps establish whether the same display function is available |
| Relevant installed options | Gives support a basis for checking configuration-dependent behavior |
| Operating mode during the observation | Prevents comparison of unlike conditions |
| Display-related setting labels and current values | Preserves the actual configuration rather than a remembered description |
| Idle interval and wake behavior | Defines the behavior you want explained |
Keep the two records side by side. Mark unknown details as unknown rather than inferring them from appearance.
Compare display-related configuration pages only through the documented interface and with the required authorization. Terms such as inactivity, backlight, blanking and sleep can help you search the correct manual, but they are not confirmed setting names for your installation.
Apply only a documented setting
The appropriate fix depends on what the comparison establishes. There is no reliable universal menu sequence for an unspecified controller and pendant combination.
If the applicable documentation identifies a display timeout setting, first confirm its scope. Check what it affects, what restores the display, whether it depends on operating mode, and whether applying it requires a restart or another controlled action.
Before making an authorized change:
- Record the original value and its exact label.
- Follow the manufacturer's configuration backup procedure where applicable.
- Confirm that the proposed value is permitted for that installation.
- Establish the approved way to restore the previous value.
- Schedule any required interruption through normal change control.
Change only the documented display parameter needed for the task. Do not transfer an entire configuration from the comparison robot to reproduce one screen behavior. Unrelated parameters can affect machine operation.
If the target installation has no matching option, stop the comparison there. Official support should establish whether the function is available for that combination. Do not install software from unofficial sources or alter protected configuration to make the screens behave alike.
Verify the result without relying on appearance
After an approved change, repeat the baseline observation under comparable, safe conditions. Check that the display blanks at the intended interval and returns through the documented wake action. Confirm whether the same page reappears and whether any unexpected alarm, restart or controller-state change occurs.
Do not use robot motion as a test of whether blanking has affected the controller. Follow the manufacturer's prescribed verification procedure for any behavior beyond the display itself.
Keep informational displays separate from machine controls. The distinction between a factory status display and an operator HMI matters here: a nearby production board cannot establish whether a pendant is healthy or whether machine motion is safe.
If the result differs from the documented behavior, follow the approved restoration procedure and record the discrepancy. Do not stack further speculative changes on top of the first one.
Separate blanking from energy savings
A black image does not prove that the backlight is off, that the pendant has entered a lower-power state, or that total machine consumption has changed. Those are separate questions.
Use manufacturer documentation to establish the intended function. If an energy figure is needed, define the measurement boundary first: pendant consumption and whole-machine consumption are different measurements.
Any electrical measurement should follow an approved method using suitable equipment and authorized personnel. Keep machine conditions comparable so that unrelated loads do not dominate the result. Do not open equipment or improvise electrical connections just to measure a display timeout.
Until documentation or suitable measurements support a claim, describe the result only as idle-screen blanking.
Give official support a complete record
When the function remains unidentified, send the controller and pendant identifiers, software versions, relevant option information, and the side-by-side observations. Include exact setting labels or permitted screenshots, excluding sensitive production information.
Ask whether inactivity blanking is supported on the target configuration, where its documented setting is located, what wakes the display, and whether it changes anything beyond display behavior. Also ask whether the observed behavior could indicate a fault rather than a configurable function.
That evidence gives support a specific question to resolve. It is more useful than reporting only that one pendant goes black and the other does not.
Questions
Where is the robot pendant screen timeout setting?
There is no universal menu path for an unspecified robot controller and pendant. Identify the hardware, software version and relevant installed options, then consult the matching manufacturer documentation. If the function is not identified there, ask official support whether that exact configuration supports inactivity blanking.
Why does one robot pendant go black while another stays lit?
The installations may differ in hardware, software, options, configuration or operating conditions. A repeatable idle interval and a documented wake response are useful observations, but they do not establish the cause. Compare identifiers and behavior before changing settings or assuming that one installation is faulty.
Does a black pendant screen save power?
A black screen alone does not establish energy savings. It may show a black image, switch off the backlight or involve another display state. Confirm the intended behavior through manufacturer documentation. Any measured savings need a defined measurement boundary and comparable operating conditions.
Does a blank pendant screen mean the robot is stopped?
No. Screen appearance does not establish the robot's motion state or whether access is safe. Follow the installation's established safety procedures and use the prescribed status indications. Do not approach the robot or test controls based on a black pendant display.
Planning information, not legal or engineering advice. Rules differ by place: check codes and permits with your local authority and your licensed trades.