Appendix A. Update Firmware - ICP DAS USA ACS-20B-MRTU User Manual

Appendix A. Update Firmware

To update the firmware, users can click the menu [Tool] -> [Firmware Update Tool] from the
ACS-20-MRTU Utility to launch the firmware update tool (must be v1.07.2). Please follow the
below steps to finish the update firmware procedure, which is also depicted in Figure A-1.
(1) Power off the module. Release the back case.
(2) Short the two pins of JP2 and then power on the module. Red & blue LED blink 2 times
per second which means it is in firmware update mode.
(3) Click "COM" radio button and select "COM Port" connected to ACS-20B(W)-MRTU..
(4) Click "Browser" to find the firmware file, e.g., acs20mrtu_v#i#i#.fw.
(5) Click "Firmware Update" button to start the update procedure.
(6) After firmware update finished, power cycle the module. Click Utility Menu [About] to
check the firmware version.
Note: The all configuration settings would not be changed except RTC time after firmware
update.
ACS-20B(W)-MRTU User Manual
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Figure A-1: JP2 position.
Version 1.1
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