9.2 Sampling Trance Function (For L40 and L60 types)
9.2.1 Overview
- The sampling trace function is available for the FP0R. Using this function enables to take samplings
and record (accumulate) the state of arbitrary data of 16 bits + 3 data registered in the PLC at an
arbitrary timing, and to examine the changes in the bit and data in details after stopping sampling at an
arbitrary timing.
- The sampling trace function is used by [Time chart monitor] under the online menu of the FPWIN GR.
The instructions, functions, special relays and special registers related to the sampling trace
function are as below.
9.2.2 Details of Sampling Trace Function
No. of data collectable at one sampling: 16 bits + 3 data
Sampling capacity (No. of samples accumulable): 1000 samples
Types of sampling timing (When an instruction is executed, or at regular time intervals)
1: Sampling at regular time intervals From 10 ms
2: Sampling by F155 (SMPL) instruction
- Sampling for every scan can be executed by the instruction. Also, more than one sampling can be
executed in one scan.
- Timing for the execution of the F155 (SMPL) instruction can be set by the ladder sequence.
- It is not possible to activate the sampling at regular time intervals and the sampling by the F155(SMPL)
instruction simultaneously.
How to stop sampling
Methods of the stop trigger (request): Following two methods are available.
1: Deactivate request by the tool software
2: Deactivate request by the F156 (STRG) instruction
- If the stop trigger activates, the PLC will continue to take samplings for the specified number of delay,
and then stop the sampling operation.
- Once the sampling operation stops, the data will be automatically retrieved by the tool software and will
be indicated in a time chart.
- For the initial settings (number of samples: 1000, number of delay: 100), the number of samples before
and after the trigger point is 900 and 1000 respectively.
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