McGann Pay Station Communication Error Diagnostic Report... | terminalfaults.org

Technical Background:

Communication errors on serial interfaces often stem from signal attenuation, incorrect baud rates, voltage fluctuations, or physical layer issues. ESD events, particularly prevalent in dry environments (winter), can corrupt data transmission. EMV terminals utilize cryptographic protocols that are highly sensitive to data corruption; even minor interruptions can trigger error states.

Symptoms:

McGann Pay Station displays a "Communication Error" message. Reported issue may be related to the serial cable connection.

Possible Causes:

Loose or improperly seated serial cable connection.
Damaged serial cable (frayed wires, bent pins).
Electrostatic discharge (ESD) affecting the communication port.
Incorrect baud rate or communication settings.
Voltage fluctuations on the serial line.
Electromagnetic interference (EMI) from nearby devices.

Solution:

1

Safely handle the device by ensuring hands are dry and free of static.
2

Power cycle the McGann Pay Station (unplug, wait 10 seconds, plug back in).
3

Verify the serial cable connection at both the Pay Station and the host system. Ensure the connectors are fully seated and secure.
4

Inspect the serial cable for any visible damage (cuts, crimps, or bent pins). Replace the cable if damage is found.
5

Clean the serial cable connectors with a dry, lint-free cloth to remove any contaminants.
6

Confirm the baud rate and communication settings on both the Pay Station and the host system match the manufacturer's specifications.
7

If possible, test with a known good serial cable to rule out cable failure.

Safety Warning:

Avoid opening the McGann Pay Station's casing. Doing so will trigger internal anti-tamper mechanisms, rendering the device unusable. Ensure the power cable is easily accessible for safe and rapid disconnection in case of emergency. Do not use liquids directly on the terminal; use a slightly damp cloth only when necessary, avoiding all ports and openings.

Prevention:

Implement cable strain relief to prevent damage to the serial cable and connectors. Regularly clean the Pay Station's exterior surfaces with a dry, lint-free cloth. Consider using an anti-static mat underneath the Pay Station, especially during dry winter months, to mitigate ESD events.

Expert Tip:

Some serial communication errors are caused by grounding issues. If possible, try a different power outlet to see if this resolves the communication problem. An external ferrite choke placed on the serial cable near the Pay Station may reduce EMI interference.

Frequently Asked Questions

•What is the manufacturer's recommended baud rate for the serial connection?

Consult the McGann Pay Station's manual for the specified baud rate. Typically 9600, 19200, or 115200.

•Are there any other devices sharing the same serial port or communication line?

Multiple devices on a single serial line can cause conflicts. Each device requires a unique address or configuration.

•Has there been any recent electrical work or new equipment installed near the Pay Station?

New electrical installations can introduce EMI that affects serial communication.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the manufacturer's recommended baud rate for the serial connection?

•Are there any other devices sharing the same serial port or communication line?

•Has there been any recent electrical work or new equipment installed near the Pay Station?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: