Why does the buzzer sound and I can't use touch switches, inputs, or recipe objects on Omron NT21?
If the buzzer sounds and you cannot use touch switches, inputs (numeral or character string), or recipe objects, the interlock function is set for the touch switch or input field and the controlling interlock bit is OFF. Check the status of the corresponding interlock bit and turn it ON.
How to fix Omron NT21 Touch terminals when the power indicator fails to come ON?
If the power indicator on your Omron Touch terminals fails to illuminate, the issue may stem from two potential causes. First, there might be a problem with the power supply. Check the connections to ensure that power is being supplied correctly. Second, the power supply fuse may have blown. In this case, you should contact your nearest OMRON representative.
Why is updating of numeric values and text delayed on Omron Touch terminals?
Several factors can cause delays in updating numeric values and text on Omron Touch terminals. The issue could be due to malfunction from external noise. Another possible cause is having too many numeral/text displays on the displayed screen; try reducing the number of these displays on the screen experiencing delays. Additionally, the host cycle time might be extended due to heavy processing at the host; attempt to shorten the host cycle time. Finally, in an RS-422A/485 connection, incorrect wiring or an erroneous terminator setting can lead to delays; ensure the wiring is correct.
How to brighten the display on Omron NT21?
If the display on your Omron Touch terminals appears dim, it could be due to insufficient contrast or brightness. For the NT31/NT31C or NT631/NT631C models, you can use the system menu to increase the contrast and/or brightness. For the NT21 model, use the switches on the back of the PT to increase the contrast. (Note that the brightness cannot be adjusted on the NT21.) Another potential cause is a defective or expired backlight. For the NT31/NT31C or NT631C models, replace the backlight. For the NT21, contact your nearest OMRON representative.
Why do digits in numeral display appear as asterisks (*) on Omron Touch terminals?
If the digits in numeral display come out as *, the number of digits of a numeric value in a numeral memory table entry exceeds the set number. Confirm the values of the PC words allocated to the numeral memory table entry and allocate one PC word to each numeral memory table entry.
Why can't my Omron Touch terminals communicate with the host?
There could be several reasons why your Omron Touch terminals are unable to communicate with the host. First, the memory switch settings might not match; ensure the communication settings in the Memory Switch menu of the Maintenance mode align with the communication protocol settings for both the host and PT. Second, the PT and host may not be correctly connected; verify that the connector cable's type, length, and installation match the specifications. Third, if using an RS-422A/485 connection, the terminator setting could be incorrect; set the terminating resistance correctly for the PTs, PCs, and RS-232C/RS-422A Adapters. Fourth, in an NT link (1:N) connection, duplicated unit numbers can cause issues; reconfigure the settings to eliminate any duplication. Finally, ensure that the PT, N...
Why can't I call up the System Menu on Omron NT21 Touch terminals?
If the System Menu cannot be called up, it is possible that Display System Menu under Change System Settings in the System Installer mode is set to Disabled. In the System Installer mode, set Display System Menu to Enabled.
Why are some set elements not displayed on overlapping screens of Omron Touch terminals?
If some set elements are not displayed on overlapping screens, it is because the data is transmitted from the host in screen units, the number of elements on the overlapping screens has exceeded the maximum permissible without being checked by the Support Tool. Check the maximum number of elements, create the screen data again, then send all the screen data in a batch to the PT.
Why doesn't the screen change when calling Device Monitor from the PPTT status control area on Omron NT21 Touch terminals?
If the screen doesn’t change when the Device Monitor function is called from the PPTT status control area, the issue might be due to the communications protocol setting at the PT not being 1:1 NT Link or 1:N NT Link. Check the memory switches and set the connected PC’s serial port protocol to 1:1 NT Link or 1:N NT Link, and ensure the same protocol is set in the PC. Alternatively, the system program installed in the PT could be for a PC maker other than OMRON; the Device Monitor function only works when connected to an OMRON PC. Verify the system program type and ensure it’s an OMRON Direct Access system program with version 3. or higher.
Why can't I input numeric values on Omron NT21?
If you are unable to input numeric values on your Omron Touch terminals, it is likely that the upper/lower (max./min.) limit check for numeric value input is in effect. Check the screen data’s upper/lower (max./min.) limit check setting for numeric value input, and correct it if necessary.
Introduces the fundamental role and operation of Programmable Terminals (PTs).
Details the features, comparisons, and principal functions of the NT series terminals.
Explains the system configuration and peripheral devices connectable to the PTs.
Covers various communication methods for connecting the PT to a host system.
Describes communication using memory links, a method other than direct connection.
Provides essential steps and considerations before operating the PT.
Describes the PT screens which form the basis of PT functions.
Explains the areas provided for PT control and status notification between PT and host.
Details input from the touch panel, allowing screen switching and bit information transmission.
Explains monitoring host bits and displaying messages or image/library data when a bit changes to ON.
Details the procedure for inputting numeric values using numeral input fields or thumbwheel switches.
Explains inputting character strings using touch switches or a bar code reader.
Describes writing and reading data in table format to/from the host, allowing multiple settings to be managed.
Covers display history, alarm history, resume, screen saver, buzzer, clock, print, contrast/brightness, programming console, and device monitor.
Details the Device Monitor function for reading/changing PC data and displaying PC error logs.
Guides on actions to take when PT errors occur, by matching symptoms to remedies.
Details how to respond to various error messages displayed on the PT.
General| Display Type | STN monochrome LCD |
|---|---|
| Display Size | 5.7 inches |
| Resolution | 320 x 240 pixels |
| Touch Panel | Analog resistive |
| Communication Ports | RS-232C, RS-422/485 |
| Power Supply | 24 VDC |
| Operating Temperature | 0 to 50°C |
| Storage Temperature | -20 to 60°C |
| Weight | 0.8 kg |
| Memory | 512 KB |
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