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8-2-2 Specific Communications Parameters
The following settings are valid only when pin 5 on the CPU’s DIP switch is
turned OFF and DM 6645 and DM 6655 are set to specify using the settings in
words DM 6646 and DM 6656.
Be sure to set the communications parameters to the same settings for both
ends of the communications.
Transmission Frame Format (See table below.)
Baud rate (See table below.)
15 0
Bit
DM 6646: RS-232C port
DM 6651: Peripheral port
Setting Stop bits Data length Stop bits Parity
00 1 7 1 Even
01 1 7 1 Odd
02 1 7 1 None
03 1 7 2 Even
04 1 7 2 Odd
05 1 7 2 None
06 1 8 1 Even
07 1 8 1 Odd
08 1 8 1 None
09 1 8 2 Even
10 1 8 2 Odd
11 1 8 2 None
Setting Baud rate
00 1,200 bps
01 2,400 bps
02 4,800 bps
03 9,600 bps
04 19,200 bps
Transmission Delay Time Depending on the devices connected to the RS-232C port, it may be necessary
to allow time for transmission. When that is the case, set the transmission delay
to regulate the amount of time allowed.
15 0
Bit
Transmission delay (4 digits BCD; unit: 10 ms)
Set to 0000 to 9999 (i.e., 0 to 99.9 s)
Default: No delay
DM 6647: RS-232C port
DM 6652: Peripheral port
Transmission Frame
Format
Baud Rate
Parameters for Host Link and RS-232C Communications
Section 8-2