Motorola MT2090 LED Definitions
In addition to beep sequences, the Motorola MT2090 uses a two-color LED to indicate status. The table below defines LED colors that display during scanning.
Hand-Held Scanning Standard Use
| LED | Indication |
| Off | No power is applied to the device, or the device is on and ready to scan. |
| Green | A bar code was successfully decoded. |
| Red | Transmission error, conversion or format error, device malfunction or RS-232 receive error. |
Hands-Free (Presentation) Scanning Standard Use
| LED | Indication |
| Off | No power is applied to the device. |
| Momentarily Off | A bar code was successfully decoded. |
| Green | The device is on and ready to scan. |
| Red | Transmission error, conversion or format error, or RS-232 receive error. |
Parameter Programming
| LED | Indication |
| Green | Number expected. Enter value using numeric bar codes. Successful program exit with change in parameter setting. |
| Red | Input error: incorrect bar code, programming sequence, or Cancel scanned. |
ADF Programming
| LED | Indication |
| Green | Enter another digit. Add leading zeros to the front if necessary. Enter another alphabetic character or scan the End of Message bar code. All criteria or actions cleared for current rule, continue entering rule. Delete last saved rule. The current rule is left intact. All rules deleted. |
| Blinking Green | Enter another criterion or action, or scan the Save Rule bar code. |
| Green after Blinking | Rule saved. Rule entry mode exited. Cancel rule entry. Rule entry mode exited because of an error or the user asked to exit rule entry. |
| Red | Out of rule memory. Erase some existing rules, then try to save rule again. Entry error, wrong bar code scanned, or criteria/action list is too long for a rule. Re-enter criterion or action. |