6F3B0250
Basic Hardware and Function 119
6. Programming Information

Sampling trace function

The sampling trace f unct ion collect s the status of specified devices or regist er at every
specified sam pling timing. The collected data can be displayed on the programmer ( T-
PDS) screen in the format of timing char t (for devices) or trend graph ( for reg ist er ). The
minimum sampling timing is t he T1/T1S’s scan cycle.
This function is useful for prog r am debugging and t r oubleshooting.
T1 T1S
Samplin
g
tar
g
et Devices (up to 8) or
Re
g
ister (only 1) Devices (up to 8) and
Re
g
isters (up to 3)
Samplin
g
capacity 256 times for device
128 times for re
g
ister 256 times
The collected dat a is stored in the T1/ T1S internal buffer.
The buffer work s as a r ing buffer, and latest collected data can be displayed.
The sampling start/s top condition (arm condit ion) and the collection timing (trigger
condition) can be specified by status changing of devices.
For detailed k ey operat ions for arm /trigger conditions setting on the T-PDS, refer t o the
manual f or T-PDS.
T-PDS scr een example of device timing chart
NOTE (1) On the T - PDS, select ‘3 regist er s + 8 devices’ as the sam pling type.
(2) As the arm and trig ger conditions, register values cannot be used.
(3) The After t im es set ting is not effective f or the T1/T1S.
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