Overview of Logging/Trace Function1-21.1 For Using Logging/Trace Function1.1.1 Applicable modelThe logging/trace function is available for the models of Ethernet type (SD card). However,this function and the sampling trace function cannot be used concurrently. Applicable models (A: Available, Blank: Not available)Item Ethernet type Non-Ethernet typeC32ET/C32EP C32T/C32PLogging/trace function ASampling tracefunction A A1.1.2 Precautions on Using This FunctionAs an SD memory card is used for the logging function, there are risks of loss of data or datadamage depending on usage conditions. Consider possible risks, design a system and makean evaluation of the system before using the function. Precautions when powering off the PLCIf the PLC is powered off during logging or accessing an SD memory card, the followingproblems may occur.• Data accumulated in the buffer memory are lost.• Files may be damaged.• The SD memory card may be damaged.Take necessary measures such as the use of an uninterruptible power system (UPS) asnecessary. Logging speed and writing speed into an SD memory cardWhen the speed accumulating data is faster than the writing speed into an SD memory card,data cannot be saved. Make an evaluation thoroughly before use.
