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Trycom Technology TRP-C29U User Manual page 45

8-channel isolated digital input and 8-channel isolated digital output(o.c) usb serial interface module, support ascii and modbus protocol.

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ID 85 ER (CRC)
*Set up Single-Channel mode (Output control for 1 Bit).
Example:
Send command :" 01 05 00 03 FF 00 "......Set up the DO3 on.
Response:"01 05 00 03 FF 00 "..... Command valid.
Send command :" 01 05 00 02 00 00 "......Set up the DO2 off.
Response:" 01 05 00 02 00 00 "..... Command valid.
*When the module is in safe mode, any digital output command are invalid, you will get the
response "ID 8F FF", which means the module is in safe mode, you can't change output status
Until the watchdog disable.
*Reset and power fail will not affect watchdog mode.
ID 85 :Error Code
ER=00 Syntax error
ER=01 Data Format error
ER=02 Start channel error
ER=03 I/O out of range
45

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