Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual page 242

DeviceNet I/O Link Unit
Determining the Node Number and Making DIP Switch Settings
Node Address Switches
DIP Switch
222
When the 32 bits of input data must be read together, modify the ladder program
in the CPU Unit receiving the data. For example, read the input data twice in suc-
cession and accept the data only when the two values match.
Unused bits in the DeviceNet I/O Link Unit's output words can be used as work
bits if they are not used for output from the slave.
Unused bits in input word cannot be used as work bits.
Use these switches to set the node address of the Unit.
Setting method: Two-digit decimal
Setting range: 0 to 63 (Do not set 64 to 99.)
Note 1. Set the rotary switches before turning ON the power supply. The switch set-
tings are read only at startup.
2. Any node address from 0 through 63 can be set as long as it hasn't been set
on another slave node.
3. If the node address is the same as one set on another node, a node address
duplication error will occur and it won't be possible to start up network com-
munications. Refer to the DeviceNet Slaves Operation Manual (W347) for
details.
The DIP switch on the front of the DeviceNet I/O Link Unit is used to set the baud
rate and whether to hold or clear the remote outputs when a communications
error occurs in the slave.
The settings of the DIP switch pins are shown in the following table. All pins are
set to OFF at the factory.
Pin
Baud rate
1
2
3 Not used
4 Hold/clear remote outputs for
communications error
Baud Rate
Pins 1 and 2 are used to set the baud rate as shown in the following table.
Pin 1 Pin 2
OFF OFF 125 kbps
ON OFF 250 kbps
OFF ON 500 kbps
ON ON Not allowed.
Note 1. Always turn OFF the PC before changing the DIP switch settings.
2. Set the same baud rate on all of the nodes (Master and Slaves) in the Net-
work. Any slaves with baud rates different from the master's rate won't be
able to participate in communications and may cause a communications er-
ror between nodes that have been set properly.
Baud rate
Not used.
Hold/clear input for communications error (when used as a slave)
Function
See the next table.
OFF
OFF:
ON:
Baud rate
Section
Setting
Clear remote outputs
Hold remote outputs
Max. transmission path length
(reference)
500 m
250 m
100 m
---
3-4