Ladder Basics and Common Instructions.
Today there will be “Ladder Basics” and “Common Instructions”.
At the end of today’s text, you can find out what:
Learn how to use instructions.
√ The name of the most common instructions and its use.
Ladder Basics
The sorting of contacts and the shells determines how a ladder step is processed.
If two or more devices are in the series (one after the other), they act as the AND instructions. To streamline the power of the ladder steps, all the conditions must be created in real form.
If two or more devices are parallel, they are managed as an OR condition. OR Conditions use multiple paths to flow.
The AND / OR condition can be combined with complex ladder steps.
Note: There should be an input condition in the stage of a ladder, and a circuit must be completed in the output. If a command is always turned on, there will be a bit ahead of it, the address will be M8000. This bit is always there on. The output coil or bracketed instruction is not directly connected to the left power rail.
Common Instructions
SET – Bit Set
RST – Bit Reset
Set the device in the form of the SET instructions coil. The RST (reset) command releases a coil.
PLS – Growing Edge Pulse
PLF – Falling Edge Pulse
PLS directive triggers the positive end of the input state, on the other hand, on the other hand, the PLF directive triggers the negative side of the input status. Both of these results are that, pulsing only scans a ladder to turn on a specific device.
Another method for pulsing contact is the growing edge and falling edge pulse bits. These bits are active only by scanning the PLS and PLF instructions only simultaneously.
Rising Edge Pulse: Growing Edge Pulse is a Skin Pulse Base which is shown on the address contact. MX as PLS Instruction and X003 as an input. The subject of this command is to follow a single scan pulse logic.
Falling Edge Pulse: Falling Edge Pulse is a Skin Pulse Base, which is shown on the address contact. M0 as a PLF directive and X004 as an input. The subject of this command is to follow a single scan pulse logic.
ALT – Toggle Bit
ALT command toggles a specific bit state. If bit is on, it turns out to be off. If the bit is off, then it becomes turned on.
ZRST – Zone Reset
ZRST (Zone Reset) command is used to reset a range of addresses. Here, the RST resets a single bit, the start and end address is specified. Address ranges can be bits, wards, timers, or counters. When Word addresses are specified, they are reset to 0 means. Second parameter (last address) must be greater than the first parameter (starting address).
This was until today’s lesson …………………………….