
B–63083EN/02
5. CONNECTION TO CNC PERIPHERALS
70
(1)NC outputs DC1.
(2)The external device starts sending data upon receiving DC1.
(3)NC sends DC3 when NC processing is delayed.
(4)The external device stops sending data to NC after receiving DC3.
The device may send up to 10 characters after receiving DC3. If it
sends more than 10 characters, alarm 087 will occur.
(5)NC reissues DC1 upon completing delayed processing.
(6)The external device restarts data output upon receiving the DC1 code
(the data must be the next data to the preceding.)
(7)NC sends DC3 upon completing data read.
(8)The external device stops sending data.
10ms or longer 10ms or longer
DC3
ER code
DC1 CD3 DC1
1ms or longer
Up to 10 characters
ER(Output)
RS(Output)
SD(Output)
RD(Input)
DR(Input)
CS(Input)
Time chart when the NC
receives data
(Read into memory)