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ICP DAS, MDC-211-ZT user manual , v1.0 Page 45
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PWR
Steady Lit
Firmware loaded correctly
Blinking (500 ms) Module initialization is failed
Err
Steady Unlit
No errors
Blinking (500 ms) There are Modbus command polling errors
SD
Function reserved
【
Other
】
If the above six LEDs are blinking alternately, the module is into the firmware
update mode (bootloader), which can update the firmware with the "FW_Update_Tool". For
more information please refer to the FAQ - Q6.