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CHAPTER 1 A/D CONVERTER MODULE
1
1.2 Features
(4) A/D conversion at any desired timing
A/D conversion is performed once immediately after the input of a trigger conversion request to obtain the digital
operation value.
The combination with the external signal assignment function allows direct input of a trigger conversion request
from the extension input module, with the following advantages:
• Being free from the effect of the sequence scan and link scan, digital operation values can be constantly
obtained at a given timing, which leads to the improvement of the reliability.
• Digital operation values can be obtained without any program, which leads to a reduction in the cost of
creating a program.
(5) Change to any scale
A/D conversion values can be converted to be within any scale, the range of which is determined arbitrarily.
According to the device that handles digital operation values, the scale can be changed without any program,
resulting in cost reduction.
(6) Detection of the disconnection
An input range of 1 to 5V, or 4 to 20mA allows the detection of the disconnection of analog input, facilitating the
diagnosis of the cause at the time of a trouble.
In combination with the external signal assignment function, the extension output module allows a signal (input
signal error detection signal) to be output to the outside without any program upon detection of the disconnection.
At this time, there is no influence of the sequence scan and link scan.
Analog input signals (CH1 to CH4)
Trigger conversion request by the external
signal assignment function
Displacement sensor
Main A/D converter module
Extension input module
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