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Chapter 2 Specifications and Functions
2-6
2.4 Functions of diagnostic digital I/O module
2.4.1 Functions of diagnostic digital input module
1) Input function
The digital input signal is received from the external to contact point, and then it is displayed in the input device of the CPU
module.
2) Wire break detection
If broken wire occurs, it is displayed in the diagnosis device of the CPU module.
- Diagnostic resistor
In order to detect broken wire, you need to connect a diagnostic resistor in parallel with the input signal device.
Please use
10KΩ 1/4W
diagnostic resistance value.
Note
Refer to
Chapter 3.3 Wiring
in this manual for Wiring of diagnostic digital Input module.
3) Input filter function
Digital input module is able to set input filter about input signal.
The range of values of the input filter user-settable is 1ms ~ 100ms. The setting method is as follows.
(1)
Double-click [I / O Parameter] in ‘project window’.