988
Serial Communications Instructions Section 3-24
Related Flags and Words The following PLC Setup settings and Auxiliary Area flag can be used as
required when executing TXD(236).
PLC Setup Settings for CPU Unit’s RS-232C Port
DM Setup Area Settings for Serial Communication Board’s Ports
Auxiliary Area
Send Ready Flags
Inner Board Flags for Serial Communications Board (Ports 1 and 2)
Programming
Console address
Name Settings
Word Bit
162 0 to 15 No-protocol Mode Send
Delay
0000 to 210F hex,
0 to 99,990 ms decimal (in 10-
ms units)
164 8 to 15 No-protocol Mode Start Code 00 to FF hex
0 to 7 No-protocol Mode End Code 00 to FF hex
165 12 No-protocol Mode Start Code
Specifier
0: None
1: Use start code.
8 and 9 No-protocol Mode End Code
Specifier
0: None
1: Use end code.
2: Use CR+LF.
0 to 7 No-protocol Mode Number of
bytes of Data
00: 256 bytes
01 to FF: 1 to 255 bytes
Setup Area word Bit Name Settings
Port 1 Port 2
D32002 D32012 15 No-protocol Mode Send
Delay Specifier
0: Default (0 ms)
1: Use delay in bits 1 to 14.
0 to 14 No-protocol Mode Send
Delay Time
0000 to 7530 hex
0 to 300,000 ms decimal
(in 10-ms units)
D32004 D32014 8 to 15 No-protocol Mode Start
Code
00 to FF hex
0 to 7 No-protocol Mode End
Code
00 to FF hex
D32005 D32015 12 to 15 No-protocol Mode Start
Code Specifier
0: None
1: Use start code.
8 to 11 No-protocol Mode End
Code Specifier
0: None
1: Use end code.
2: Use CR+LF.
Port Address Contents
CPU Bus Unit’s built-in RS-232C Port A39205 ON when data can be sent in
the no-protocol mode.
Serial Communications Board port 1 A35605
Serial Communications Board port 2 A35613
Name Address Contents
Inner Board Service Dis-
abled Flag
A42404 ON when TXD(236) is executed for a
Serial Communications Board that
does not support no-protocol mode (a
Board without a version number).
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