Omron CJ - REFERENCE MANUAL 02-2010 Reference Manual page 880

3. Instructions
PLC Setup Settings for CPU Unit's RS-232C Port
Programming Console address
Word Bit
162 0 to 15
8 to 15
164
0 to 7
12
165 8 and 9
0 to 7
DM Setup Area Settings for Serial Communication Board's Ports
Setup Area word
Port 1 Port 2
D32002 D32012
D32004 D32014
D32005 D32015
Function
• RXD(235) reads data that has been received in no-protocol mode at the CPU Unit's built-in RS-232C
port or one of the Serial Communications Board's serial ports (the port is specified with bits 8 to 11 of
C) and stores N bytes of data in words D to D+(N 2)-1. If N bytes of data has not been received at
the port, then only the data that has been received will be stored.
• The following receive message frame format can be set in the PLC Setup (for the CPU Unit's RS-
232C port) or the allocated DM Setup Area (for the Serial Communications Board's ports).
1) Start code: None or 00 to FF hex
2) End code: None, CR+LF, or 00 to FF hex. If no end code is specified, the number of bytes to
received is set from 00 to FF hex (1 to 256 decimal; 00 specifies 256 bytes).
• Data will be stored in memory in the order specified in C.
• Cases where the reception completion flag turns ON
The Reception Completed Flag (note (a)) will turn ON when the number of bytes specified in the
PLC Setup (for the CPU Unit's RS-232C port) or the allocated DM Setup Area (for the Serial
Communications Board's ports) has been received. When the Reception Completed Flag turns ON,
the number of bytes in the Reception Counter (note (b)) will have the same value as the number of
receive bytes specified in the PLC Setup or the allocated DM Setup Area. If more bytes are received
than specified, the Reception Overflow Flag (note (c)) will turn ON.
If an end code is specified in the PLC Setup or the allocated DM Setup Area, the Reception
Completed Flag (note (a)) will turn ON when the end code is received or when 256 bytes of data
have been received.
• Reception will be stopped if 259 bytes of data are received. If more data is input after that, the
Overrun Error Flag (note (e)) and Transmission Error Flag (note (f)) will turn ON. If an overrun error,
framing error, or parity error occurs on the CPU Unit's built-in serial port, serial port reception will
stop. The serial port must be restarted to begin reception again.
844
Name
No-protocol Mode Send Delay
No-protocol Mode Start Code
No-protocol Mode End Code
No-protocol Mode Start Code Specifier
No-protocol Mode End Code Specifier
No-protocol Mode Number of Bytes of Data
Bit Name
No-protocol Mode Send Delay Specifier
15
No-protocol Mode Send Delay Time
0 to 14
8 to 15 No-protocol Mode Start Code
0 to 7 No-protocol Mode End Code
No-protocol Mode Start Code Specifier
12 to 15
No-protocol Mode End Code Specifier
8 to 11
Number of Bytes of Data
0 to 7
Settings
0000 to 210F hex,
0 to 99,990 ms decimal (in 10-ms units)
00 to FF hex
00 to FF hex
0: None
1: Use start code.
0 hex: None
1 hex: Use end code.
2 hex: Use CR+LF.
00 hex: 256 bytes (default)
01 to FF hex: 1 to 255 bytes
0: Default (0 ms)
1: Use delay in bits 1 to 14.
0000 to 7530 hex
0 to 300,000 ms decimal (in 10-ms units)
00 to FF hex
00 to FF hex
0 hex: None
1 hex: Use start code.
0 hex: None
1 hex: Use end code.
2 hex: Use CR+LF.
00 hex: 256 bytes (default)
01 to FF hex: 1 to 255 bytes
CS/CJ/NSJ Series Instructions Reference Manual (W474)
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