Omron CP1H CPU Operation Manual page 485

DeviceNet I/O Link Units
CPM1A-DRT21 DeviceNet I/O Link Unit
(5) Expansion I/O Connecting Cable
(1) DeviceNet Communications Connector
Used to connect DeviceNet communications. For the wiring, use the con-
nector provided with the CPM1A-DRT21 or use a connector purchased
separately.
(2) Rotary Switches (SW2, SW3)
Used to set DeviceNet node numbers.
Setting range: 0 to 63 (Do not set 64 to 99.)
(3) DIP Switch (SW1)
Used to set the DeviceNet baud rate and the output hold function.
Pin 1 Pin 2
OFF OFF 125 kbps
ON OFF 250 kbps
OFF ON 500 kbps
ON ON Not allowed.
Pin 4 DeviceNet baud rate
OFF Clears remote outputs when communications error occurs. (Outputs
turned OFF for each logic value.)
ON Holds remote outputs when communications error occurs.
Note When using Expansion Unit/Expansion I/O Unit Error Flags (A436)
in the program, set pin 4 on the DIP switch to ON. If communica-
tions are set to be cleared, the timing for clearing outputs and set-
ting the Error Flags may not agree.
Baud rate setting (See note.)
Baud rate
500 m
250 m
100 m
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Output hold function setting
Section 7-7
(2) Rotary Switches
(3) DIP Switch
(4) LED Indicators
(6) Expansion Connector
(1) DeviceNet Communications
Connector
Max. transmission path
length
451