
28. DATA INPUT/OUTPUT
B–63682EN/01
NC FUNCTION
206
DNC1 is a network originally developed by FANUC. Personal computer
FA supports a connection mode called mode 1 of DNC1. This mode
allows multi–point communication in which the personal computer
functions as a primary station to control multiple NCs. In personal
computer FA, up to 16 NCs can be connected to a single personal
computer. For details, refer to ”Personal Computer FA System Operator’s
Manual (B–75044EN).”
DNC1 board
DNC1 board
(for NC)
NC
Optical fi-
ber cable
COP1
Personal
computer
Optical
adapter B
Terminating
resistor unit
Ta p
Metal
cable
When three NCs and a personal computer are
connected via optical adapter B
User applications created using the FA library of personal computer FA
can perform the following processing:
z NC program file downloading started from the personal computer
z NC program file uploading started from the personal computer
z External reset
z Selection and deletion of NC programs
z Read of NC directory information
z Read of alarm information
z Read and write of tool offset values
z Read and write of custom macro variables
z Read of tool life management data
z Read and write of PMC data
z Read of NC identification information
z Read and write of NC parameters
z Notification of the start and end of NC program file downloading and
uploading started by an NC
28.6
DNC1 CONTROL
Connection example