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Communications Functions Section 1-9
Transmission Frame
Format
Baud Rate
Transmission Delay Time Depending on the devices connected to the RS-232 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.
1-9-2 Wiring Ports
Refer to the CQM1 Operation Manual, CPM1 Operation Manual, CPM1A
Operation Manual or SRM1 Master Control Units Operation Manual for infor-
mation on wiring the communications ports.
1-9-3 CQM1 Host Link Communications
Host link communications were developed by OMRON for the purpose of con-
necting PCs and one or more host computers by RS-232C cable, and control-
ling PC communications from the host computer. Normally the host computer
issues a command to a PC, and the PC automatically sends back a response.
Thus the communications are carried out without the PCs being actively
involved. The PCs also have the ability to initiate data transmissions when
direct involvement is necessary.
In general, there are two means for implementing host link communications.
One is based on C-mode commands, and the other on FINS (CV-mode) com-
mands. The CQM1 supports C-mode commands only. For details on host link
communications, refer to SECTION 6 Host Link Commands.
Setting Stop bits Data length Stop bits Parity
00171Even
01171Odd
02171None
03172Even
04172Odd
05172None
06181Even
07181Odd
08181None
09182Even
10182Odd
11182None
Setting Baud rate
00 1,200 bps
01 2,400 bps
02 4,800 bps
03 9,600 bps
04 19,200 bps
15 0
Bit
Transmission delay (4 digits BCD; unit: 10 ms)
Default: No delay
DM 6647: RS-232C port
DM 6652: Peripheral port
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