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3-3SectionConnecting to a Node
30
Transmission Frame Format
Setting Start
bits
Data
length
Stop
bits
Parity Setting Start
bits
Data
length
Stop
bits
Parity
00 1 7 1 Even 06 1 8 1 Even
01 1 7 1 Odd 07 1 8 1 Odd
02 1 7 1 None 08 1 8 1 None
03 1 7 2 Even 09 1 8 2 Even
04 1 7 2 Odd 10 1 8 2 Odd
05 1 7 2 None 11 1 8 2 None
Baud Rate
Setting Baud rate
00 1,200 bps
01 2,400 bps
02 4,800 bps
03 9,600 bps
04 19,200 bps
The baud rate cannot be set to 1,200 bps for the Controller Link Support Soft-
ware.
Set the communications parameters for the PC according to the communica-
tions parameters for the Controller Link Support Software.
Setting the Node Number
Node no. (2 digit BCD) 00 to 31
Initial status: 00 (node no. 00.)
RS-232C port: DM 6648
When multiple PCs are connected to the host computer, a node number is as-
signed to each PC for identification purposes. Assign the PC the same node
number as that specified in the Controller Link Support Software.
Use the DIP switch on the PC and the PC Setup to set the communications pa-
rameters for the Host Link connection.
Note Use the SYSMAC Support Software to set up the PC Setup.
I/O port setting (selector switch)
Set the selector switch to RS-232C.
System setup (DIP switch pin 4)
To set to the values specified by the DIP switch: Set DIP switch pin 4 to ON.
To set to the values specified in the PC Setup: Set DIP switch pin 4 to OFF.
Note For CPU Units manufactured before June 1995 (lot No.
jj65), the default values specified by the DIP switch differ
from those specified in PC Setup as follows:
The default values specified by the DIP switch are 2,400 bps,
one stop bit, even parity, and 7-bit data length.
The default values specified in the PC Setup are 9,600 bps, two
stop bits, even parity, and 7-bit data length.
For CPU Units manufactured after July 1995 (lot No. jj75), the
values specified in the DIP switch have been changed to 9,600 bps
and two stop bits to make them identical with those of the PC
Setup.
Commu-
nications
port
RS-232C
RS-422
CVM1 and CV-series PCs