Overview of Trace function

The trace function is used to record arbitrary contacts and data information together with time stamp information in the buffer memory in the CPU unit at any time.
Logging data can be uploaded from the buffer memory to the tool software after the trace operation, and can be displayed as a time chart. Traced data can be saved in SD cards in files in CSV format.
When you have selected Bit as the trace stop condition, data recording will continue after the stop trigger until the specified number of Samples after stop trigger has been reached.
Use Data recording under Project > PLC in the project navigator to set the conditions for the data recording.
The settings are downloaded to the PLC as part of the project data and stored in the ROM1. The download of settings can be done via SD card.

The data recording operation can be executed by the following operations:
- Selecting the Start button in the Data recording window
- Using the FP_LOGTRACE_START instruction
- Setting the configuration to Start when changing to RUN mode starts data recording operation automatically

Specifications

Item	Specifications
	FP7	FP0H	FP-XH
Max. number of records	1,000,000 records	60000 records	40000 records
Max. number of generated files per log folder	2000	2000	1500
Max. number of variables	Max. 500 variables (500–2000 words) / 1 record	Max. 182 variables (182–2000 words) / 1 record	Max. 182 variables (182–1500 words) / 1 record
Buffer memory Shared with the logging function.	Can be divided into max. 16 (LOG0–LOG15) areas for use.	Can be divided into max. 4(LOG0–LOG3) areas for use.
Trace trigger condition	Bit device ON: Trace is executed when the condition is met at the end of a scan. Interval: Hour, minute, second, millisecond Instruction (FP_LOGTRACE_SAMPLE): Executes an instruction with an arbitrary condition and starts trace.
Trace stop condition	Bit device ON: When you have selected Bit as the trace stop condition, data recording will continue after the stop trigger until the specified number of Samples after stop trigger has been reached. Buffer memory full
File format	Data is saved in CSV format. Arbitrary comments can be given. The upper limit of the capacity on the file system is 4 GB.

Image of trace function