
A-79227E
Title
Draw
No.
Ed. Date Design Description
Date Jan.09.’04 Design. Apprv.
8/22
Page
FANUC Series 30i-MODEL A
External Data Input
The controller checks the state of the RST (NC reset) signal for a reset input
between the rising edge of the ESTB signal (read signal for external data
input) and the start of the search. Concretely, the controller cancels the
external program number search if the RST (NC reset) signal becomes 1
even momentarily in this period. The ESCAN signal (search cancel signal
for external data input) becomes high at the beginning of the search.
However, it becomes low when the next search is executed (for example,
when a cycle start or reset signal is input), similarly to the ESEND signal
(search completion signal for external data input).
Read signal for external data input
(ESTB)
Read completion signal for external
data input (EREND)
Reset signal
(RST)
ESEND does not become high.
Search completion signal for exter
data input (ESEND)
Search cancel signal for external
data input (ESCAN)
ESTB positive-going edge
Beginning of search
ESCAN becomes high at the beginning of a
search
If RST becomes 1 even momentarily in this
period
Fig. 1.1(b) Timing diagram of External data input