Frequently asked questions
The most frequently asked questions about installation, starting Live, communication, redundant servers, scripts, remote monitoring, TV and logs, with short answers. Each answer links to the relevant topic.
Every answer is short; for details, go to the topic at the end. For tables from symptom to solution, see the Troubleshooting guide; for known limitations, see Known limits.
Installation and startup
Why does the Select project screen appear when Live is opened?
No project is given on the command line and Start automatically with the last project is off (this is the default in a new installation). Select the project or turn on automatic start. See Live overview.
Studio or Live does not start; it shows a WebView2 error. What should I do?
Microsoft Edge WebView2 Runtime is not installed on the computer. Install Microsoft's Evergreen Standalone Installer package and restart the program. The setup installs the Runtime with the installer included in its own files; if it could not install it, it reports this in the last step (on 32-bit Windows 10, or if Data\Prerequisites is missing, internet access is required). See Installation.
Will my projects be deleted if I update or uninstall the program?
An update does not touch the settings files or the Live\Projeler folder. When uninstalling, the Projeler folder that contains projects is not deleted; however, the logs folders and the two settings files are deleted. See Installation.
Why is the change I made in Studio not visible in Live?
Live reads the project when it opens it. Save the project, transfer it with Upload project to Live…, and reopen the project in Live. See Uploading the project to Live.
Can Live run two projects at the same time?
No. Live runs a single project; Change project… closes the open project and opens the selected one. See Live overview.
Communication and values
The connection shows no connection. Where can I see the reason?
In Live, a red message appears below the connection in the system menu › Connections section. Go to the right driver topic according to the beginning of the message. See Connection problems.
Why does it never say connecting?
PLC drivers do not report this state: until a connection is established, no connection is shown, and the message is empty until the first attempt is finished. See Connection diagnostics.
Why does a value appear gray or as ####?
The quality of the tag is not good: there is no connection, there is an address error or the first value has not arrived yet. If the connection is established but only one tag is gray, the address or data type is wrong. See Tag errors and quality and Scaling and quality.
I have corrected the address. When does the value arrive?
An unreadable tag is retried every 30 seconds; a data block loaded to the PLC later recovers within this interval. If you changed the address in Studio, you must load the project to Live and reopen it. See Connection problems.
Can I connect to the same PLC with both S7 and OPC UA?
Yes. Give both connections the same IP address: because the ports are different, there is no conflict. Only a second connection with the same address, port and endpoint parameters cannot be opened (Connections table).
Can another SCADA or MES read the tags of Live?
Yes. Turn on the OPC UA Server section and select in the HMI tags table which tags are exposed. It is a separate license item (OPC UA server).
Can I connect directly to Modbus devices on an RS-485 line?
Yes. Select the Modbus RTU (serial) or Modbus ASCII (serial) driver and enter the COM port as the address (COM3). Create a separate connection for each device on the line; they all use the same port and the same serial settings, and their device addresses differ. See Modbus serial line.
With a redundant PLC (two CPUs), which CPU does Live communicate with?
If Backup PLC (automatic switchover) is on in the S7 drivers, Live connects to both CPUs and communicates with the one that is master; the master is determined from a bit, from a CPU number or from reachability only. The CPU being communicated with is shown below the connection in the system menu. See Automatic switchover to the backup PLC.
Are MQTT 5 and client certificates supported?
Yes. Set MQTT version to MQTT 5.0; the client certificate is provided with TLS from a PFX file or from the Windows certificate store. The PFX password is entered in Live. See MQTT driver.
Can alarms be sent by e-mail or SMS?
Yes. Define the contacts, rules and channels in the Notifications section. Messages are sent by the Live computer; if Live is closed, no notification is sent. Do a test send first on the real server and account (Notification center).
No alarms are generated. Why?
The most common causes: Live settings is off in Startup sequence › Alarm system, the alarm's trigger tag has not been selected, or the trigger tag cannot be read. See Startup sequence and Alarm definition.
Redundant server
Can I run two SCADA computers redundantly?
Yes. In Device configuration, set Operating mode to Redundant server pair (redundancy), enter the Windows names of the two computers and put the same project file on both computers. Only the master communicates with the PLCs. See Redundant server pair.
Can I operate the plant from the standby server?
Yes. On the standby, tag writes, alarm acknowledgement, shelving and comments are forwarded to the master, which carries them out. Buttons that run scripts, manual report records and recipe transfer by script do not work on the standby. See Redundant server pair.
When does the standby take over if the master fails?
When the master does not respond for the Timeout (s) (default 5 s) and the counter on the PLC arbiters is not increasing. The standby's screen is then reloaded and the PLC connections are established. If the master is running and only its PLC connection is lost, the switchover does not take place automatically. See Redundant server pair.
Live says The project on the partner server differs from the one on this computer.
The project files on the two computers are not the same. Uploading the project twice separately also causes this, because each upload writes a new revision to the file. Upload once and copy the same file to the other computer. See Redundant server pair.
Reports and assistants
Can I get an automatic report at the end of a shift or day?
Yes. In the Performance Reports section, set up a report from a template, bind the tags and add a plan. Live produces PDF and Excel and, if you wish, distributes them by e-mail. For the record of a single production batch, use the Reports section (Performance reports).
Does the AI Assistant need the internet?
Not while it runs: the model runs on the Studio computer. The AI package is not included in the setup. Sign in at www.fabyavision.com and download FabyaVision_AI_<sürüm>.zip from the Download page (about 4.8 GB). For a computer with no internet, carry it on a USB drive (Required package).
Scripts
Which scripting language should I choose?
JavaScript is enough for short tag operations and calculations, but it has no database, file or program execution functions. If you need these, use VBS, C or Python. If you are migrating from another SCADA, the VBS or C you are used to is suitable. See Scripts overview.
Why does my script not run?
First check that the script is bound to a task, event or button, that the task is enabled and that the change has been uploaded to Live. Then filter the Script type in the event log. See Script and task problems.
Where do script errors appear?
In the event log (Event view object) and, for scheduled tasks, in the System menu › Tasks… window. No window is opened for the operator; nothing is written to the program's logs file either. See Log files.
What does The script exceeded the time limit (30 s) mean?
A VBS, C or Python call ran computations for longer than 30 seconds; most likely there is an infinite loop. Implement waiting with a scheduled task, not with a loop. JavaScript has no such limit. See Script and task problems.
My script cannot write a file or connect to the database.
The database, program execution and file permissions are off by default. In Studio, enable the required permission under Live settings › Script permissions and upload the project again; only in projects you trust. See VBScript.
Remote monitoring and TV
Why can I not control anything when monitoring from the browser?
Browser monitoring is read-only by default. For control, turn on Remote monitoring › General › Remote control in Studio and give the user an authorization group in Browser users; then load the project into Live. Setting changes and closing the program remain possible only on the Live computer. See Remote control.
Why can I not log on from two computers with the same browser user?
A browser user can connect from only one computer at a time. Log off on the other computer, or close the browser and wait 15 seconds; the permanent solution is to create a separate user for each person. See Remote monitoring.
The address does not open from the browser or returns 403.
If it does not open, the Windows Firewall permission, the network address of the Live PC or the port may be wrong; in Live, use Remote monitoring… in the system menu › Add firewall permission window. The message Access from this address is not allowed. (403) shows that the client's address is not in the allowed access networks. See Remote monitoring.
Can I expose remote monitoring to the internet?
Not recommended. Browser monitoring uses plain HTTP; passwords are not encrypted. For access over the internet, set up a VPN. See Remote access over VPN.
Why does the TV not open?
The second-display TV requires a display that is used neither by Live, nor by the multi-monitor setup, nor by the additional monitor pages; otherwise the window does not open. For TVs on the network, Browser monitoring must be on. See Multi-monitor and TV.
Why does the on-screen keyboard not open?
In the System menu, On-screen keyboard may be Inactive; the field may be read-only; or you are monitoring from a browser (the keyboard works only in the local Live). See On-screen keyboard.
Settings, logs and support
Why does a screen not appear in the system menu?
The Screens list of the system menu shows only the start screen and the favorite pages. Make the screen a favorite in Studio, or add a navigation button for it (Favorite pages).
The lighting of the 3D scene is not the same as in Studio.
The operator may have selected one of the Day, Evening, Night or Studio buttons on the right. The selection is stored on that computer and applies to all 3D scenes (3D screens).
Where are the log files?
The program logs are in the Studio\logs and Live\logs folders; in Studio, Help›Open log folder opens the folder. The event log is in the <Ad>.veri\gunluk folder next to the project file. See Log files.
Does the event log fill the disk?
The event, alarm and recipe transfer logs are not deleted automatically. Back up and delete old monthly files. See Files and folders of Live.
What should I send when requesting support?
The program log of the day with the problem, the event log file, the project file, the version information and a screenshot. Do not send the baglanti_sifreleri.json file. See Log files.