Omron CJ Series Operation Manual page 87

Precautions for Safe Use
Always set the same communications mode number on the rotary switch on the front of the Com-
poNet Master Unit and for the communications mode number setting when you register the Unit
on the Sysmac Studio (MODE@ in the Unit Name). If these mode numbers are not the same, the
communications mode that is set on the rotary switch on the front of the CompoNet Master Unit
is used for operation. However, the device variables are automatically created according to the
unit name that is set on the Sysmac Studio. Therefore, the intended data is not accessed when
you try to access I/O data for the Slave Unit. Set the communications mode number carefully.
DIP Switch
The settings on the DIP switch are read when the power supply is turned ON to the Controller.
Baud Rate Setting
SW1
DR0
OFF
ON
OFF
ON
Slave Units automatically detect the baud rate set on SW1 (DR0) and SW2 (DR2). It is not neces-
sary to set the baud rate separately for any of the Slave Units.
Communications Error Communications Stop Mode Setting
SW
3 ESTP (Communications Error
Communications Stop Mode)
If you turn ON SW3 (ESTP), all remote I/O communications will stop if a communications error
occurs for any Slave Unit. (*_CommStopSta (Communications Error Communications Stop Flag) in
*_UnitSta (Status) will change to TRUE.) If you turn OFF SW3, remote I/O communications will con-
tinue even if a communications error occurs for any of the Slave Units.
Registration Table Enable Setting
SW
4 REGS (Registration Table Enable
Setting)
If you turn ON SW4 (REGS), the Registration Table that was edited or downloaded from the CX-Inte-
grator will be enabled when the power supply is turned ON. Only the registered Slave Units will join
the network and the registered Slave Units are compared to the actual Slave Units. If they do not
agree, *_RegTblErr (Registration Table Verification Error Flag) in *_UnitSta (Status) will change to
TRUE.
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)
SW2
DR1
OFF
OFF
ON
ON
Name
Communications stop when a
communications error occurs.
Name
Registration Table enabled.
2 CompoNet Master Unit
Baud rate setting
4 Mbps (default)
3 Mbps
1.5 Mbps
93.75 kbps
ON
Communications do not stop
when a communications error
occurs.
ON
Registration Table disabled.
2
OFF
OFF
2-9