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3 SPECIFICATIONS
3.2.2 RS-232 cable specifications
3 - 4
6)
RS Signal (7)
• If RS/CS control is being exercised, the QD51 (-R24) is turned ON or
OFF according to the size of the empty space in the OS area for
reception data storage. (It is ON when it is ready to receive data.)
When the RS signal is OFF, reception data have been stored in the
OS area, so read out the reception data from a BASIC program.
If RS/CS control are not being exercised, it is normally ON.
7)
CS Signal (8)
• When OFF, data are not sent to the target device from the QD51
(-R24).
• When the target device is in the ready-to-receive state, set it so that
it is normally ON.
REMARK
During data communications, the status of each control signal, DTR, DSR, RS and
CD, can be checked with the ZCTRL command processing code 33.
Refer to the Programming Manual (Commands) for the ZCTRL command.
(2)
The ON and OFF states of each signal represent the following conditions.
(Output Side)
ON
: 5 V DC to 15 V DC
OFF :
15 V DC to
(3) Interface connector
The following RS-232 interface connector is used for the QD51(-R24).
• DDK Ltd.
9- pin D-sub (female) screw type
17L-10090-27 (D9AC) (-FA)
Use the following as a connector shell for the connection cable of
the QD51(-R24) side.
• DDK Ltd.
Plug, shell: 17JE-23090-02 (D8A) (-CG)
• Use an RS-232 cable which complies with the RS-232 standard and which has
a length of 15 m or less. (Recommended cable)
• Oki Electric Cable Co., Ltd.
7/0.127
P HRV-SV ( : Specify the number of pairs. For 13 pairs 7/0.127 13P
HRV-SV)
(Input Side)
3 V DC to 15 V DC
5 V DC
15 V DC to
MELSEC-Q
3 V DC
3 - 4
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