
A-79227E
Title
Draw
No.
Ed. Date Design Description
Date Jan.09.’04 Design. Apprv.
5/22
Page
FANUC Series 30i-MODEL A
External Data Input
Explanation for connection
The following signals are used to send data from the PMC to the CNC.
Signal name Input signal Output signal
Address signal for external data input EA0 to EA6
Data signal for external data input ED0 to ED31
Read signal for external data input ESTB
Read completion signal for external data input EREND
Search completion signal for external data input ESEND
The basic external data input procedure
The basic external data input procedure is described below:
(1) The PMC sets the address signals, EA0 to EA6 that indicate the data type
and data signals ED0 to ED31.
(2) The PMC sets the read signal ESTB to “1”.
(3) When the ESTB signal is set to “1”, the control unit reads the address.
(4) After reading the address, the control unit sets the read completion signal
EREND to “1”.
(5) When the EREND signal is set to “1”, the PMC sets the ESTB signal, to
0.
(6) When the ESTB signal is set to “0”, the control unit sets the EREND
signal to 0.
This completes the data input procedure. New data can now be entered.
The timing diagram is shown below:
EA0~EA6
ED0~ED15
ESTB
EREND
ESEND
Only for external program number search
End of
search
Fig. 1.1(a) Timing diagram of External data input