Troubleshooting 'Invalid Parameter' errors on a Moneris API. Covers power fluctuations, ESD, cabling issues, and software configuration.
Identifying the problematic parameter narrows down the cause to data formatting or value range issues.
Recent changes could introduce incompatibilities or configuration errors.
The full error message might contain additional details about the cause of the error.
The 'Invalid Parameter' error usually arises from incorrect data types, out-of-range values, or missing required fields in the API request. Communication issues, such as voltage drops affecting data transmission integrity (UART signal degradation), can also corrupt the data packet. Furthermore, Electrostatic Discharge (ESD) events can introduce noise into the data stream, leading to parameter misinterpretation at the API level. Baud rate mismatches between the terminal and the host system can also corrupt parameters.
Avoid contact with the terminal's internal components. The device contains sensitive anti-tamper mechanisms; unauthorized access will permanently disable the device. To avoid electric shock, always disconnect the power supply before inspecting cables. Be aware of ESD risks, especially in dry environments. Use Safe Handling procedures (unplugging) rather than LOTO.
Regularly inspect and clean all cables and connectors. Ensure adequate ventilation to prevent overheating. Implement a surge protector to guard against voltage fluctuations. Maintain a dry environment to minimize ESD risk, especially during winter months. Periodically review and update the API integration software to ensure compatibility and adherence to the latest API specifications.
A common cause is incorrect date/time settings. If the API uses timestamps for transaction validation, an incorrect system clock can trigger 'Invalid Parameter' errors. Synchronize the system clock with a reliable time server. Try cycling the power on the Moneris API - unplug the power supply, wait 30 seconds, and then reconnect it. This can clear transient errors.