Question

欧姆龙PLC的数据类型

欧姆龙PLC的数据类型都有那些?分别是什么?可以拿CJ1M或CP1H来举例,如INT和UINT有什么区别?
谢谢.
还有其他类型的呢?
能不能逐个讲下呢,谢谢

Answer 1

首先得明确，你说的都是数据类型。但不同的数据类型，和工业现场的不同物理量，是相关联的。
1、bool，比如omron的ir区，是bit（位）的概念，它只有两个状态，0或1，实际等同于开关量输入信号；可与现场的开关量连接，用于逻辑处理；
2、word是字，一个字有16个位，比如你用的omron-c200he主机，输入00200~00215共16个开关量的位（16个开关量输入），它们组合可以构成一个字。这个字是包含16个位的二进制数据。这就通常用于数据计算了。
3、chanel是通道，专指i/o（输入/输出）通道。这个通道可以是开关量，也可以是模拟量。
开关量你一定知道了，omron的ad003模拟量输入，在工作时，是需要占用一定的dm
数据区的（用于定义滤波、输入通道有效等），同时cpu通过总线底板读入模入数据，也是一个通道（实际也是一个字）四位16进制数，0~0fa0，也是16位二进制数。在模拟量数据采集中常会用到，你在cx-p编程软件的符号一栏中，可以看到chanel。
4、udint也是指数据类型，不是什么信号，int是整型数据，udint是32位0~4294967295整型。

Answer 2

BOOL
Address of a binary bit - a logical Boolean on or off state. This type is typically used for contacts or coils.

CHANNEL
This is a special data type, for backward compatibility. It is an address (non-bit) to data of any type (unsigned or signed, one or more words), so can be used in place of any of the above data-types except NUMBER and BOOL. The data type is weak, and so checking is limited (e.g. CX-Programmer cannot check if the address is being used for BCD or binary values).

DINT
Address of a signed, double binary word.

INT
Address of a signed, single binary word.

LINT
Address of a signed, quad binary word.

NUMBER
A literal numeric value. Not an address. The value can be signed, or floating point. NUMBERs are used for any literal value or for timer/counter identifiers (in this case, only unsigned integer values are allowed). Floating point values are only suitable within IEEE REAL type operands.

Note: when used as BCD number operands, the value is treated as a hexadecimal value (e.g. using a NUMBER E234Eis equivalent to typing E1234Eas the operand, so that the decimal interpretation is made of the value). The value of a NUMBER data type is assumed to be decimal, unless it is prefixed with '#' for a hexadecimal value.

REAL
Address of a double word floating point value (IEEE format - use the UDINT type for the BCD, FDIV format).

LREAL
Address of a long word floating point value (IEEE format - use the ULINT type for the BCD format).

UDINT
Address of an unsigned, double binary word.

UDINT_BCD
Address of an unsigned, double BCD word.

UINT
Address of an unsigned, single binary word.

UINT_BCD
Address of an unsigned, single BCD word

ULINT
Address of an unsigned, quad binary word.

ULINT_BCD
Address of an unsigned, quad BCD word.

WORD
Address of a bit string of 16 bits.

DWORD
Address of a bit string of 32 bits.

LWORD
Address of a bit string of 64 bits.