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Explanations of PLC Setup Settings Section 7-2
Note When pin 5 of the DIP switch on the front of the CPU Unit is ON, the CPU Unit
automatically detects the communications parameters of a Programming
Device (including Programming Consoles) connected to the RS-232C port.
Those automatically detected parameters are not stored in the PLC Setup.
Note 1. A no-protocol transmission delay (address 162) can be set in no-protocol
mode. The operation of this delay is shown in the following diagram.
2. The following table shows the message formats that can be set for trans-
missions and receptions in no-protocol mode. The format is determined by
the start code (ST) and end code (ED) settings. (From 1 to 256 bytes can
be received in no-protocol mode.)
←ON
5
CONTROLLER
CJ1G-CPU44
SYSMAC
PROGRAMMABLE
ERR/ALM
RUN
COMM
INH
PRPHL
OPEN
PERIPHERAL
BUSY
MCPWR
PORT
RS-232C port communications settings when DIP switch
pin 5 is OFF:
Default settings:
Host link mode, 1 start bit, 7 data bits, even parity,
2 stop bits, and a baud rate of 9,600 bps
User-defined settings:
Set the communications mode (host link, NT Link,
no-protocol*, or peripheral bus) and other settings
such as the baud rate.
*See notes 1 and 2 for details on no-protocol mode.
Start code setting End code setting
None Yes CR+LF
None DATA DATA+ED DATA+CR+LF
Yes ST+DATA ST+DATA+ED ST+DATA+CR+LF
TXD(236)
No-protocol delay
Delay
Transmission
Time
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