Mitsubishi Electric MELSEC-L Series LD40PD01, User Manual

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9 CREATING A HARDWARE LOGIC
9.1 Main Blocks in the Hardware Logic Outline Window
■
Minimum value of the pulse width that may be taken in as input
For general-purpose input, noise or others may be taken in as input depending on the filter time setting. The following table
lists the minimum values of the pulse width that may be taken in as input for each filter time.
■ Link with SSI encoder blocks
When an external input block is linked with the "Data" terminal of an SSI encoder block, the "Filter Time" of the external input
block is automatically changed according to the setting value of "Transmission Speed" of the SSI encoder block. Additionally,
if the setting value of "Transmission Speed" of the SSI encoder block after linked is changed, the "Filter Time" of the external
input block is automatically changed according to the new value.
When the link between the external input block and the "Data" terminal of the SSI encoder block is deleted, the "Filter Time" of
the external input block returns to the default value.
■
"Initial State"
When ON signals are constantly input from external devices during a hardware logic control stop, a rise is detected in an input
signal event detection block at a hardware logic control start. To prevent rise detection at a hardware logic control start, set
"Initial State" to "High".
Output
The following table shows the output of the external input block.
Filter time Minimum value of the pulse width that may be taken in as input
10
μ
s 6
μ
s
50 μ s 32 μ s
0.1ms 0.06ms
0.2ms 0.12ms
0.4ms 0.24ms
0.6ms 0.36ms
1ms 0.6ms
5ms 3ms
Variable name Data type Linkable block Output value Description
Output Bit • Parallel encoder
• Multi function counter
• Logical operation
• SSI encoder 0, 1 Outputs the signals that have passed the filter.
Selecting "Logic Select" outputs inverted signals.