Toshiba T2N - Manual (Page 145)

5.RAS Functions
132 PROSEC T2N
(4) Sequence time over detection function
The alarm step is provided for one of SFC (sequential function chart)
instructions. This Alarm step turns ON the specified device when the
following transition is not come true within the preset time from the start of
the step.
This function allows easy detection of operation holds up in sequential
control process.
With the above example, if the transport has not been completed (work
arrived signal ON etc) within 10 seconds, the specified alarm device (R1000)
comes ON. By this means a malfunction generated by the work drive or
the sensor can be detected.
Refer to Part 3 of this manual and the other instruction set manual for
explanation with respect to SFC.
(SFC structure)
(action part)
(transition conditions)
A
Processing
completed
Transport
completed
work
work transport
Alarm step
monitor timer = T003
monitor time = 10 seconds
alarm device = R1000
120
121
T003
1000
R1000
122