Omron CPM2C User Manual

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Preparation for Operation Section 7-3
In general, set only the baud rate with the CPU Unit and leave the frame for-
mat settings set to their defaults (1 start bit, 7 data bits, 2 stop bits, and even
parity.)
The following table shows the factory default settings.
Terminating Resistance
Switches (SW4)
Turn ON both SW4-1 and SW4-2 if the Simple Communications Unit is at the
end of the RS-422/RS-485 transmission path. The factory default setting is
OFF (terminating resistance disconnected) for these switches.
!Caution The power must be turned OFF before changing the settings on SW4-1 and
SW4-2. Do not touch SW4 when the power is ON because static electricity
may cause a malfunction.
7-3-3 PC Settings
Communicating at the
Default Baud Rate
Set the CPM2C CPU Unit’s Communications Switch and PC Setup as follows
when communicating at the default baud rate (9,600 bps) between the Simple
Communications Unit and CPU Unit.
Using Standard Port Settings for the RS-232C Port
Turn ON the CPU Unit’s Communications Switch to use standard communica-
tions settings for the communications port. When this switch is ON, the stan-
dard settings are used for communications through the RS-232C port and
peripheral port regardless of the PC Setup settings in DM 6645 through DM
6649 and DM 6650 through DM 6654.
Note The peripheral port’s Host Link node number must be set to 00. Operation will
be disabled if any other value is set.
Using Customized Port Settings for the RS-232C Port
Turn OFF the CPU Unit’s Communications Switch to use allow customized
communications settings for the communications port. Communications
through the RS-232C port are governed by the PC Setup settings in DM 6645
through DM 6649 and communications through the peripheral port are gov-
erned by the PC Setup settings in DM 6650 through DM 6654.
Set DM 6650 to 0000 to specify standard host link communications through
the peripheral port.
Note The peripheral port’s host link node number must be set to 00. Operation will
be disabled if any other value is set.
Communicating at
19,200 bps
Set the CPM2C CPU Unit’s Communications Switch and PC Setup as follows
to communicate at 19,200 bps between the Simple Communications Unit and
CPU Unit.
Pin Default setting Function
1 OFF Baud rate with CPU Unit (9,600 bps)
2 OFF Baud rate with components (9,600 bps)
3 OFF Data length with components (7 bits)
4 OFF Parity setting with components (enabled)
5 OFF Parity setting with components (even)
6 OFF Stop bits with components (2 bits)
7 OFF Not used. (Leave OFF.)
8 OFF Component communications speed (normal)
Word Setting Function
DM 6650 0000 Use standard Host Link communications settings.

Omron CPM2C Specifications

General

Brand	Omron
Model	CPM2C
Category	Controller
Language	English