9-27
9 PLC Setup
CJ2 CPU Unit Software User’s Manual
9-3 PLC Setup Settings
9
9-3-6 Serial Port Settings
NT/PC Link Max.
z RS-232C (No-protocol) Settings
Use the No-protocol Mode to perform no-protocol communications with a bar coder or other device.
Start Code
End Code
Delay
Parameter Settings Default Function Related flags and words
NT/PC Link
Max.
0 to 7 1 This setting determines the highest unit number
of PT that can be connected to the PLC.
A619.02
(Serial Port Settings
Changing Flag)
Parameter Settings Default Function
Related
flags and
words
Start Code Disable or Set Disables Set whether a start code will be used for
the frame format of data to be sent and
received with no-protocol communica-
tions.
---
0x0000 to 00FF
(0000 to 00FF hex: “0x”
means the same as hex.)
0x0000
(00 hex)
Set the start code as a hexadecimal
value.
Parameter Settings Default Function
Related
flags and
words
End Code • Received Bytes (no end
code)
•CR LF
• Set End Code
Received
Bytes
Set the type of end code that will be used
for the frame format of data to be sent
and received with no-protocol communi-
cations
---
Received
Bytes
256 or 1 to 255 256 If the number of received bytes is
selected for the end code, the data length
will be set in byte units for no-protocol
communications sent and received.
The length of the end code and start
code are not included in the data length.
The maximum data length that can be
sent or received with one
TXD(236)/RXD(235) instruction is 256
bytes by default.
Set End
Code
0x0000 to 00FF
(0000 to 00FF hex: “0x”
means the same as hex.)
0x00
(00 hex)
If “end code” is specified for the end
code, set it here as a hexadecimal value.
Parameter Settings Default Function
Related
flags and
words
Delay 0 to 99990 ms (10-ms
units)
0 ms When the TXD(236) instruction is exe-
cuted, data will be sent from the serial
port after the send delay set here has
expired.
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