Modubs command-05 (control digital output):

turn ON output1:
send:0A 05 00 00 FF 00 8D 41
feedback:0A 05 00 00 FF 00 8D 41

turn OFF output1:
send:0A 05 00 00 00 00 CC B1
feedback:0A 05 00 00 00 00 CC B1
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Modubs command-01 (read digital output state):

send:0A 01 00 00 00 06 BD 73
feedback:0A 01 01 01 92 6C  (output1=ON, output2--6=OFF)
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Modubs command-02 (read digital input state):

send:0A 02 00 00 00 06 F9 73
feedback:0A 02 01 01 62 6C  (input1=ON, input2--6=OFF)
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Modubs command-03 (read multi registers):

register: address:(200)dec (C8)hex digital input+digital output state

send:0A 03 00 C8 00 02 44 8E
feedback:0A 03 04 00 01 00 00 11 33

note:00 01 00 00 = 00 01 (input1=ON, input2--6=OFF)  00 00  (output1--6=OFF)