1, BOOL, such as Omron's IR region, is the concept of bit, with only two states, namely 0 or 1, which is actually equivalent to the switch input signal; Can be connected with the field switch value for logic processing;
2. A word is a word, and a word has 16 bits. For example, if you use Omron -C200HE mainframe, enter 00200 ~ 00215 * * 16 bits (16 switch input), and their combination can form a word. This word is binary data containing 16 bits. This is usually used for data calculation.
3.CHANEL is a channel, especially I/O (input/output) channel. This channel can be a switching value or an analog value.
You must know the switch value. When Omron's analog input AD003 works, it needs to occupy a certain DM data area (used to define filtering, effective input channels, etc. ). At the same time, the CPU reads analog data through the bus backplane, which is also a channel (actually a word). 16, 0~0FA0, 16 has four binary digits. It is often used for analog data acquisition. You can see chanel in the symbol column of CX-P programming software.
4.UDINT also refers to data type, not signal. INT is integer data, and UDINT is a 32-bit integer from 0 to 4294967295.