Checking User Program - Toshiba V Series User Manual

Chapter 6 Troubleshooting

6.4 Checking user program

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Check the program based on the following points if it is running but the operation does
not work as intended.
(1) Output is not carried on the same coil or register or variable of two or more locations
during one scanning; the devices or variables for coil instructions and for function
instructions are not overlapping.
(2) The signal which changes faster than the scanning cycle is not input.
(3) The same instance is used by a multiple number of timer or counter instructions.
(4) When an interrupt is used, the device/register which is used in the main program is
not operated erroneously in the interrupt routine.
(5) There is a flash ROM write error. (This can be checked with the system log of the
engineering tool.) If this is the case, write the flash ROM again using the engineering
tool.
model 2000 Sequence Controller S2 User's Manual -Basic Hardware-