Search the PDF for keywords like “EMI,” “debounce,” “pin 10 function,” or “spindle relay delay.” The manual’s index is sparse, but the content is dense.
Happy machining, and may your steps never be missed. Disclaimer: This article is an interpretive guide based on publicly available documentation. For absolute certainty, verify all connections and parameters with the original XC2003 manual provided by your manufacturer.
Searching for the "xc2003 controller manual" can be frustrating. Often, the included quick-start guide is too brief, or the CD-ROM is long lost. The XC2003 is a rugged, widely used industrial programmable logic controller (PLC) and motion controller, common in CNC routers, engraving machines, 3D printers, and automated production lines. Understanding its manual is critical for safe operation and unlocking its full potential.
This LMC simulator is based on the Little Man Computer (LMC) model of a computer, created by Dr. Stuart Madnick in 1965. LMC is generally used for educational purposes as it models a simple Von Neumann architecture computer which has all of the basic features of a modern computer. It is programmed using assembly code. You can find out more about this model on this wikipedia page.
You can read more about this LMC simulator on 101Computing.net.
Note that in the following table “xx” refers to a memory address (aka mailbox) in the RAM. The online LMC simulator has 100 different mailboxes in the RAM ranging from 00 to 99.
| Mnemonic | Name | Description | Op Code |
| INP | INPUT | Retrieve user input and stores it in the accumulator. | 901 |
| OUT | OUTPUT | Output the value stored in the accumulator. | 902 |
| LDA | LOAD | Load the Accumulator with the contents of the memory address given. | 5xx |
| STA | STORE | Store the value in the Accumulator in the memory address given. | 3xx |
| ADD | ADD | Add the contents of the memory address to the Accumulator | 1xx |
| SUB | SUBTRACT | Subtract the contents of the memory address from the Accumulator | 2xx |
| BRP | BRANCH IF POSITIVE | Branch/Jump to the address given if the Accumulator is zero or positive. | 8xx |
| BRZ | BRANCH IF ZERO | Branch/Jump to the address given if the Accumulator is zero. | 7xx |
| BRA | BRANCH ALWAYS | Branch/Jump to the address given. | 6xx |
| HLT | HALT | Stop the code | 000 |
| DAT | DATA LOCATION | Used to associate a label to a free memory address. An optional value can also be used to be stored at the memory address. |