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12.4. Coils
Coils are read using function code 01 and written to using either function code 05 or 15. Function code 05 is used when
writing to a single coil register, function code 15 is used for writing to multiple coil registers in the same command.
Note the values of all Coil registers have corresponding Holding registers which can be used instead.
Coils (Digital Outputs)
Register Name
Address
Modicon
Address
Details
Drive On/Off
(Note: Holding register address 7
can also be used to change the
Drive)
0 00001
0 = Drive OFF
1 = Drive ON
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