OMRON NT Series HMI Replacement and Maintenance
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作者:FAN
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发布时间 :2026-04-20
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46 次浏览:
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In industrial automation sites, OMRON NT series programmable terminals (PTs) serve various production lines for a long time due to their stable performance and rich communication interfaces. However, with the discontinuation of models such as NT31, NT31C, and NT20 in 2014-2015, a large number of devices still in operation faced practical problems such as spare parts depletion, inability to migrate screen data, and mismatched communication interfaces. How to smoothly replace HMI or extend the service life of existing NT series without stopping production has become a core skill that on-site engineers must master. This article will provide a complete NT series maintenance and replacement guide from five dimensions: model identification, communication protocol selection, screen data backup and conversion, system program upgrade, and common troubleshooting.
Replacement steps:
Turn off the power and open the back battery cover.
Remove the old battery and immediately install the new battery (ensuring correct polarity).
After powering on, enter the system menu and reset the date and time.
5.5 Abnormal or blurred screen display on the screen
Possible reasons:
The contrast setting is incorrect (NT31 can be adjusted through the touch panel, NT20 needs to adjust the potentiometer on the back).
System program damage or version mismatch (requires reinstallation of system program).
Screen data verification error (retransmission of screen data).
