Caption text
| Port |
Select the port (or byte) of the digital input device to receive
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| Action type |
| BCD byte |
Receive the whole byte and use the binary coded decimal value (0 to 255) to pass to the command.
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| BCD byte pulse |
Receives a byte as a pulse. It assumes that the inputs will return to zero. Thus valid codes are 1 to 255.
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| BCD nibble low pulse |
Receives the lower nibble as a pulse. It is assumed that the inputs will return to zero. Thus valid codes are in the range 1 to 15
|
| BCD nibble high |
Receive the upper nibble and use the binary coded decimal value (0 to 15) to pass to the command.
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| BCD nibble high pulse |
Receives the upper nibble as a pulse. It is assumed that the inputs will return to zero. Thus valid codes are in the range 1 to 15
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| input line - |
Receive a bit and pass to command on high to low transition.
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| Input line + |
Receive a bit and pass to command on low to high transition.
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| input line both |
Receive a bit and pass to command on either the high to low or low to high transitions.
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| Select input |
| Input |
Select the specific input line of the port to receive.
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| BCD |
If you select nibble or byte 'Input value', the BCD value of that part of the input port will be passed to the command. This will result in a command for each value of 1 to 15 for a nibble and 1 to 255 for a byte.
If you select an absolute value, the command is triggered only when that value appear on the input nibble 9or port.
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A bit is regarded as a single input line.
A byte is 8 bits. This is the size of a port of a digital interface device.
A nibble is 4 bits. Thus a digital interface port has 2 nibble designated upper (input 5 - 8 ) and lower (inputs 1 - 4)
