Question: [PLC sets the programming element specified by the bit address to 1] What is this bit address?

一沙一世

Question: [PLC sets the programming element specified by the bit address to 1] What is this bit address? [Copy link]

I saw the following description in the PLC document:

Coil
The coil represents the output result, and controls external indicator lights, contactors, etc. through the output interface circuit.

When the result of the logic operation of the contacts on the left side of the coil is 1, the "energy flow" can reach the coil, causing the coil to be energized and activated, and the PLC sets the programming element specified by the bit address to 1;

Question : [ PLC sets the programming element specified by the bit address to 1] What is this bit address and what is its relationship with this coil?

freebsder

You can think of it as a bit-to-function mapping. An irresponsible analogy is the control bit of a microcontroller, although the length of the bit of a PLC is larger.

Gen_X

This is the basic knowledge of microcontrollers and digital circuits, not PLC knowledge.

The PLC needs to set a bit output to 1, and set the corresponding port register to 1 through software instructions. This port register is connected to circuits such as optoelectronic isolation, and some are also connected to relays, completing your output setting operation.

For example, some use (S) and (R) to directly operate registers, some use instructions, and some use ladder diagrams or higher-level language modules.