User manual

User manual Version 2.3

ABLELink

Serial-Ethernet Server

GW21W

 GW21W will automatically restart each time the firmware is successfully downloaded.

B.2 Critical Issues of Upgrading

1. You can always abort the upgrading process by pressing the <Esc> key from host PC during the

upgrading process. The serial server will restart automatically and the system remains intact.

2. If GW21W does not receive any upgrade data within 30 seconds, the serial server will restart

automatically and the system remains intact.

3. After the upgrading process finishes, the serial server will program the flash memory and buzzer

beeps 6 times then restarts. Normally, it takes around 10 seconds to complete the programming

process. If an error occurs during the programming process,GW21W will clear the corresponding

memory and the system remains intact of what it was.

B.3 Error Messages

Firmware upgrade may not be successful if errors occur during the process.

Error Cause Message Comments

Illegal Hex file format Hex File Text Error

Hex File Check-Sum Error

Hex File Format Error

Hex File End of Record Error

GW21W handshaking problem GW21W ACK Start Address Error

GW21W ACK Length Error

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