4.2. Converting program Changing the PLC Change the PLC model in the CP1E user program from “CP1E” to “CP2E” or “CP2E-N” with the CX-Programmer. Also set the CPU model. 4.3. Checking error and warning report Check for errors after converting to the CP2E. Select Program → Compile to check the program. If the Output window shows errors or warnings, check the details for each. If a ladder rung contains an error, a red line appears down the left-hand side of the rung. Compile can check the following contents. • Illegal data • Instruction support by PLC • Operand ranges • Program capacity for PLC • Syntax • Ladder diagram structure • Output duplication • Tasks 13