This paper is going to explain the different types of OR logic gates and how they can be used
OR logic gates could be categorized into two major groups:
The first group is the NAND gate, which has a low current output when both inputs are low. This type of gate does not require a pull-up resistor when it is in the circuit. The second group is the NOR gate, which has a low current output when both inputs are high. This type of gate requires a pull-up resistor. The third group is called an OR-AND gate, which has a high current output only when both inputs are high or when one input is high and one input is low.
Programmability is flexible, and a single PLC may control several units.
Any alteration is quickly reprogrammed.
Provide simple troubleshooting and error correction.
There are a lot of contacts available.
There are several software timers, counters, and relays available.
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