M218 System Variables

Overview

This chapter:

ogives an introduction to the system variables

odescribes the system variables included with the M218 PLCSystem library

What Is in This Chapter?

This chapter contains the following sections:

oSystem Variables: Definition and Use

oPLC_R and PLC_W Structures

oSERIAL_R and SERIAL_W Structures

oETH_R and ETH_W Structures