pyhoff.DigitalInputTerminal#
- class pyhoff.DigitalInputTerminal(bus_coupler, output_bit_addresses, input_bit_addresses, output_word_addresses, input_word_addresses, mixed_mapping)#
Bases:
BusTerminal
Base class for digital input terminals.
Instantiate a new BusTerminal base class.
- Parameters:
bus_coupler (
BusCoupler
) – The bus coupler to which this terminal is connected.output_bit_addresses (
list
[int
]) – List of addresses of the output bits.input_bit_addresses (
list
[int
]) – List of addresses of input bits.output_word_addresses (
list
[int
]) – List of addresses of output words.input_word_addresses (
list
[int
]) – List of addresses of input words.
- read_input(channel)#
Read the input from a specific channel.
- Parameters:
channel (
int
) – The channel number (start counting from 1) to read from.- Return type:
bool
|None
- Returns:
The input value of the specified channel or None if the read operation failed.
- Raises:
Exception – If the channel number is out of range.
- classmethod select(bus_coupler, terminal_number=0)#
Returns the n-th bus terminal instance of the parent class specified by terminal_number.
- Parameters:
bus_coupler (
BusCoupler
) – The bus coupler to which the terminal is connected.terminal_number (
int
) – The index of the bus terminal to return. Counted for all bus terminals of the same type, not all bus terminals. Started for the first terminal with 0
- Return type:
TypeVar
(_BT
, bound= BusTerminal)- Returns:
The selected bus terminal instance.