YASKAWA YASNAC J50 Connecting Manual page 48

RS: Request for sending (output) – When sending data, NC is
turned ON when starting transmission, and turned OFF when
transmission ends.
CS: For sending (input) –When this input signal is ON, NC can
send data. If the machine under control is unable to process
data in time, it can turn OFF this signal to interrupt the
transmission of data from NC within2 characters. When this
signal isnotused, connect lines asshown in Table 14.4.
SG: Signal grounding.
ER: Data terminal ready – Use this signal as a tape rewinding signal
if a tape reader is connected to an RS-232C interface. The tape
reader can be rewound if this signal is ON.
NOTE
Among the RS-232C interface signals, the following are
normally not used by the NC.
DR: Data set ready
ER: Data terminal ready
CD: Data receiving carrier detection
However, when " 1" is set for parameter CHKDR (#6021 D4), a
DR (data set ready) interlock is added.
(6) Signal Exchange Timing
. When NC receives data.
Data can be received in the following sequence and timing.
(a) NC sends code DC1.
(b) At code DC1, the machine under control starts to send data to
NC.
(c) If the NC can not process data in time, it sends out code DC3.
(d) At code DC3, the machine stops sending data within 10
characters.
(e) NC again sends code DC1 after processing data.
(f) At code DC1, the machine sends out the data that succeeds the
previously sent one.
(g) Upon reading in the data, NC sends out code DC3.
(h) The machine stops sending data.
~RTPUT
DC1 DC3
DC1 7
DC3
~uTpuT~
SD
, ., ,.
RD
J
INPUT
1="
~
10 CHARACTERS MAX
Cs
INPUT
Fig. 14.3
* @ represents "rewide stop code", which is the same as "%" of ISO.
(a) NC sends out code DC2, and subsequently sends out data.
(b) If the machine under control can not process the data in time,
NC stops CS at no IO BUSY signal.
(c) Upon completion of the data processing by the machine, NC
turns on CS. NC sends out data that succeeds the previous one.
(d) Upon completion of data sending, NC sends out code DC4.
;?tTPUT
DC2
~–
DC4
SD
OUTPUT ~
Cs
L
INPUT
Fig. 14.4
NOTE
D.C1 and DC3 code from RD is not available when NC sends out data.
(7) Parameter Setting
When using RS-232C, set data transmission baud rates, stop bit
lengths, and control code sending specifications with the
parameters shown in Table 14.6.
(a) RS-232C interface port selection
Select the RS-232C interface port by setting #6003.
Table 14.5 RS-232C Interface Port Selection
Interface Input output
RS-232C port 1 #6003Do #6003D4
Note: The above bit is selected at parameter setting" 1"
(b) RS-232C interface port 1
Baud rate setting of RS-232C interface port 1 is shown in Table
14.6.
Table 14.6 Baud Rate Setting
~
110
0 0 1 0
~
150 0 0
1 1
z
>
200
0 1 0 0
2
300
0 1 0
1
2
m
600
0 1 1
~
o
m 1200 0 1 1
1
2400
1 0 0 0
4800 1 0 0
1
9600
1 0 1
0
When NC sends out data
NC sends out data in the following sequence and timing.
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