Chapter 3 PLC System Configuration & Settings 3.3.2.4 CPU Advanced Parameter Click the CPU tab on the top of the page and click the Advanced tab at the bottom of the page, you can set the initialization related settings. When PLC CPU switches from stop to run, the system initializes the retentive values or the non-retentive value. Not Retain Init Value Use: When PLC CPU switches from stop to run, the system initializes the non-retentive value. Retain Init Value Use: When PLC CPU switches from stop to run, the system initializes the retentive value. 3-169