INP-TN512878-E
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4.8 Sequence circuit of program setting wafer
When a program-setting wafer (26, 27) of a primary control block is used, it is necessary to create an
appropriate sequence of input (pause, reset, preset). The example shown below indicates a sequence
in which the program wafer is automatically reset and the program is started by a start signal when the
power is ON.
Figure 4-14
When the power is ON, the program-setting wafer is automatically held in the reset state (state where
reset terminal X2 of the program wafer is “1”). When the external momentary signal (DI2) changes
as “0”
→
“1”
→
“0”, the reset input (X2) of the program wafer changes from “1” to “0”, and the
program wafer starts up. The reset input (X2) of the program wafer is held at “0” at this time.
When the program terminates, the end signal (Y4) of the program wafer changes to “1”, the program
wafer reset input (X2) is held at “1” (reset state) by way of the changeover wafer, in preparation for
the next start signal. When the program wafer is reset, the end signal (Y4) is also reset to “0”
automatically.
Summary of Contents for CC-M
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