
B–63503EN/02
5. CONNECTION TO CNC PERIPHERALS
65
(iv) Cable length
The cable length depends on the external device type. Consult with
the device manufacturers for actual connecting cable lengths.
When cable A (A66L–0001–0041) is used, cable length is as
follows by the specification of NC.
for RS–232–C 100m or less ... 4800 bauds or less
60m or less ... 9600 bauds or less
(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 100ms 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)