Sampling Trace Function; Operation Of Sampling Trace Function; Details Of Sampling Trace Function - Panasonic FP0H User Manual

Sampling Trace Function

7.1 Sampling Trace Function

7.1.1 Operation of Sampling Trace Function

 What is Sampling Trace Function?
• Using the sampling trace function enables the PLC to take samples, record and accumulate
the state of arbitrary data of 16 bits + 3 data registered in the PLC, 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 in the time chart monitor function under the online menu
of FPWIN GR7.
• The logging/trace function and sampling trace function cannot be used simultaneously.
Either one of them can be used.
 Instructions, special relays and special registers used for Sampling trace function
Number Name
F155(SMPL) Sampling instruction
Sampling stop trigger
F156(STRG)
instruction
R902C Sample point flag
R902D Sampling trace end flag
R902E Sampling stop trigger flag
R902F Sampling enable flag
DT90028 Interval of sampling trace

7.1.2 Details of Sampling Trace Function

 No. of data collectable at one sampling
16 bits + 3 data
 Sampling capacity
1000 samples
 Types of sampling timing (When an instruction is executed, or at regular time
intervals)
1: Sampling at regular time interval, from 10 ms
2: Sampling by F155(SMPL) instruction
• Sampling for every scan can be executed by the instruction. Also, more than one samplings
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.
7-2
Operation
Performs sampling of set data.
Stops sampling.
Sampling by instruction=0, Sampling at regular time
intervals=1
When sampling trace starts=0 stops=1
Turns on when sampling stop trigger is on.
Turns on when sampling operation starts.
K0: Sampling by SMPL instruction
K1 to K3000: (10 ms to 30 seconds) For sampling at regular
time intervals