Toshiba V Series User Manual page 144

Chapter 3 Precautions for I/O Modules
3
122
(8) If dynamic scan input is configured using a DC input module and a DC output module,
in addition to the response-delay of output and input, consider the difference of timing
caused by the S2 scan. Moreover, diodes must be installed to prevent erroneous input
caused by detour circuit. (the figure below is an example of 4 × 4 input)
For example, when contact a is ON, the change timing between output 0 and input 0
is as follows.
S2 scan cycle
Output 0 (internal)
Output 0 (external)
Input 0 (internal)
Input 0 (external)
Note that the change timing of output 0 and input 0 will be affected with the scan
time of the S2 module and the response time of input and output.
T
1
T T
1 2
T
2
model 2000 Sequence Controller S2 User's Manual -Basic Hardware-
:Output response delay
:Input response delay