ALLEN BRADELY MICROLOGIX

Use this instruction to determine the total number of characters in the input buffer, up to and including the end-of-line characters (termination). On a false-to-true transition, the processor reports the number of characters in the POS field of the ASCII control block. The serial port must be configured for User mode.

1. On each false-to-true transition, this output instruction loads a bit of data into a bit array, shifts the pattern of data through the array to the right, and unloads the end bit of data. 2.their will be bit shift when you use this instruction in your programming . which store a value at the address we give .

Branch Start instruction

Characters are the number of characters in the buffer that the processor finds (0-1024). This parameter is for display only and resides in Word 2 of the control block.

Control is the area that stores the control register required to operate the instruction. This must be a direct address using the R filetype.

A circuit diagram used to display electrical control systems like relays and timers. They consist of power rails on either side with contacts and coils forming the "rungs of the ladder."

Abbreviation for milliAmps. Milli is a standard metric designation for 1/1000th. Therefore 1 mA = 0.001 Amps.

A communication protocol used to share data between controllers. It was originally designed for Modicon PLCs but was adopted by many other manufacturers since it is an open architecture and thus has become an industry standard.

This instruction sets the specified bit when rung continuity is achieved (rung goes true). Under normal operating conditions, if the set bit corresponds to an output device, the output device will be energized when the rung goes true.

An EIA standard that specifies electrical, mechanical and functional characteristics for serial communications. It is used for point to point communications less then 15 meters long.

A ladder logic term that refers to a series or branch of instructions connected together that drive an output. The term is derived the look of ladder logic which resembles a ladder with rungs.

RS Logix is PLC programming software. It contains all the instructions needed for PLC programming. We can develop the program, down load / upload the program, work on line / off line and force the I/Os using the software. RS Logix 500 is used for Micrologix and SLCs RS Logix 5000 is used for Control Logix PLCs

This instruction (also called "examine on" or "normally opened") functions as an input or storage bit.