After the CLICK and panel upgrades, the F1 and F5 setup combination locks the 3-inch C-More Micro until a power-on reset. Recover with a power-cycle, then clear the panel's project memory by powering on with F2 and F4 held, set the CLICK driver Poll Time to 10 ms or more in Panel Manager, and apply update 2.31 as the permanent fix.
On a 3-inch C-More Micro, the F1 and F5 key combination opens the panel's setup screen. After the recent CLICK and panel upgrades, that same combination can freeze the panel instead, and only a power-on reset brings it back. The record ties the fault to those upgrades, gives a two-part workaround, and closes with update 2.31 as the permanent fix. The workaround's parts are a panel memory clear, done by powering the panel on with F2 and F4 held, and a project change: the CLICK driver Poll Time set to 10 ms or more in Panel Manager. This page walks through recovery, both workaround parts, the update, and the test that confirms the setup keys work again with the PLC online.
Why does F1 and F5 lock up the 3-inch C-More Micro after an upgrade?
The upgrades are the trigger: after the CLICK update and the panel update, pressing F1 and F5 to enter setup mode locks the 3-inch C-More Micro until a power-on reset, and the correction on record is update 2.31.
The freeze shows up in both states the panel normally works in: connected to the CLICK and executing the project, and connected to the PC programming software. Either way, the key press locks the unit, and the locked unit also refuses reprogramming and memory clearing, because it never reaches the state where it accepts a connection. That is why the recovery order below starts with a power-cycle. The maker's guidance on record gives the workaround in two parts and then marks the fault fixed, so the repair path is documented from start to finish.
Which symptom points to which fault?
Match what the panel does to the row below before you touch anything, because the reset that recovers a freeze and the reset that repairs the fault are two different procedures, and only one of them clears project memory.
- Freezes right after F1 and F5, runs again after a power-cycle: the post-upgrade setup-key lockup; apply the workaround and update 2.31 below.
- The same freeze with the CLICK online and executing, or with the PC programming software connected: the same fault; the operating condition leaves the repair unchanged.
- Setup keys dead but the panel stays responsive: a different problem; check the project's function-key assignments and the panel's setup access setting first.
- PC software or simulator faults after the same upgrades: a separate fault family; the simulator faults have their own fix.
- Beep features missing after the upgrades: reported alongside the lockup; no separate correction on record, so log the silent ones and verify them after the update.
Only the first two rows get the repair in this article. The third and fourth rows have their own paths, and the beep row rides along as a verification item.
How do you recover a locked panel right now?
Cycle power: a power-on reset brings the panel back immediately, but it does not touch the fault, and the very next press of F1 and F5 can lock the panel again. Remove power for at least 10 seconds so the panel's supply has time to fully discharge before you re-apply it.
Treat the reset as recovery, nothing more. A locked panel also refuses project downloads and memory clears, so cycle power first and connect second. Before the next section, save the current project from the PC and open the copy to confirm it is usable, because the memory clear ahead erases the panel's stored project.
How do you clear the panel project memory with F2 and F4?
Power the panel on while holding F2 and F4: this is the documented reset to factory default, and it erases the project stored in the panel, so keep a saved project copy on the PC before you do it.
- Save the project from the PC and open the copy for editing to confirm it is usable.
- Apply power with F2 and F4 held down and let the reset to factory default run to completion.
- Confirm the panel comes back at factory defaults, with the stored project gone.
Check: if the key sequence will not complete, stop and confirm the combination against the panel's manual before another attempt. Pressing F1 and F5 to test at this stage re-arms the fault.
A deliberate erase with keys held is one thing; a project vanishing after a plain power cycle is a different fault with a separate article.
What should the CLICK driver Poll Time be set to?
Set the CLICK driver Poll Time to 10 ms or more: the change lives in the project file, in Panel Manager, and a panel memory clear without it leaves half the workaround undone.
- Open the project in the PC programming software and go to Panel Manager.
- Find the CLICK driver's Poll Time, note the value it had before, and raise it to the specified minimum or higher.
- Save the project and download it to the panel with the panel's normal load procedure.
Check: read the Poll Time back in Panel Manager before the download and confirm the new value took. The workaround names this parameter and this value exactly, so enter it exactly.
Which update fixes the lockup permanently?
Update 2.31 is the fix on record: once it is applied, the F1 and F5 combination opens setup mode without freezing the panel, and the memory-clear workaround can retire.
The maker announced the fix three days after posting the workaround. That announcement gives the number without separating panel firmware from programming software, so read the installed versions off the panel and the PC software and match them against the maker's firmware history, which lists corrections version by version. Install the package that covers what your installation runs, using the maker's update procedure, and keep the workaround settings in place until the verification section passes with the PLC online.
If the panel ends up unable to communicate after a firmware update, that is a different fault with its own article.
What does a worked example of the full fix look like?
One line, one panel: a 3-inch C-More Micro on a CLICK PLC locks on the first press of F1 and F5 after the upgrades, and the repair below takes it from locked to verified in four documented moves.
Scenario: a packaging line runs a C-More Micro against a CLICK PLC. Both the CLICK software and the panel were upgraded in the past month. An operator pressed F1 and F5 for the setup screen, the panel froze, and the line waited 20 minutes before a technician pulled power for 10 seconds and brought it back. The project's latest copy sits on the PC.
- Recover. Power-cycle, with power off for at least 10 seconds. The panel runs the project again; nobody touches F1 and F5 yet.
- Clear. Apply power with F2 and F4 held. The reset to factory default runs, and the panel's stored project is erased. The PC copy is untouched.
- Set. In Panel Manager, set the CLICK driver Poll Time to 10 ms, note the old value in the change log, save, and download the project.
- Fix and test. Apply update 2.31 through the maker's update procedure, then press F1 and F5 with the CLICK online and executing: the setup screen opens and the panel stays responsive. A final power-cycle starts the project normally.
Result: setup access works in the exact condition that locked the panel before, the stored project is back inside the panel, and the whole repair stays inside the four moves. The line and the month-old upgrades are illustrative; every move is the documented procedure.
How do you verify the fix with the PLC online?
Test in the condition that locked it: with the CLICK online and executing, press F1 and F5 and confirm the setup screen opens and the panel stays responsive through a full power-cycle afterwards.
- Press F1 and F5 with the CLICK online and executing. The setup screen must open and the panel must stay responsive.
- Press F1 and F5 again with the PC programming software connected, with the same expectation.
- Power-cycle once. The project must start on its own, and the setup keys must still work afterwards.
- Exercise every beep the project uses and log the silent ones; the beep features ride as their own follow-up.
- Sign the line off only when the combination works in both conditions without a reset.
If operators will use setup after the repair, protect the rest of it with the documented password path for the HMI setup menu; that is project configuration, separate from this fault.
Recommendation: recover with a power-cycle, back up the project, clear the panel's memory by powering on with F2 and F4 held, set the CLICK driver Poll Time to 10 ms or more in Panel Manager, download the project, and apply update 2.31. If the panel already runs the updated software, skip the memory clear and the Poll Time change and go straight to the verification test.
When should you stop and contact the maker?
Stop and use the maker's official support channel when the F2 and F4 reset will not complete, when it is unclear which package update 2.31 belongs to, or when the project will not load after the memory clear.
Have five things ready when you do:
- The installed version shown by the panel and by the PC programming software.
- The CLICK driver Poll Time value in the loaded project.
- The conditions that trigger the freeze: CLICK online and executing, PC software connected, or both.
- Whether the F2 and F4 reset completes, and what the panel shows afterwards.
- The dates the CLICK and panel upgrades went in.
Keep those five items in the panel's maintenance record either way. The next technician who meets a frozen panel will want them.
Questions
Can I keep using the setup keys between the workaround and update 2.31?
Yes, once both workaround parts are in place and the panel passes the online test in the condition that used to freeze it. If the panel locks again anyway, power-cycle to recover, then confirm two things before any further key presses: the CLICK driver Poll Time is still 10 ms or more in Panel Manager, and the updated software shows as installed. Resets without those checks just leave the fault waiting.
Do the missing beep features come back with update 2.31?
The fix on record covers the F1 and F5 lockup specifically. Nothing in the record ties the missing beep features to their own correction, so treat them as a separate verification item. After the update, exercise each beep the project uses, log the ones that stay silent, and raise them with the maker's support channel as their own case.
What if the panel locks before anyone saved a project copy?
Prevent it from there on: keep the current project on the PC and copy it somewhere safe after every change. If a panel locks with no PC copy, the F2 and F4 reset still erases the stored project, so the project has to be rebuilt from the last known configuration or recovered through the maker's support channel. The reset stays part of the repair; with panel memory uncleared, the lockup keeps returning.
Planning information, not legal or engineering advice. Rules differ by place: check codes and permits with your local authority and your licensed trades.