Western Reserve Controls, Inc.
1782-JDO User’s Manual
PRELIMINARY
11
Table 2-4
DeviceNet Consume Assembly / Transmit Data Format
BYTE
MEANING
Byte 0
1
st
B1 data byte, DO’s 0-7
Byte 1
1
st
B1 data byte, DO’s 8-15
Byte 2
2
nd
B1 data byte, DO’s 0-7
Byte 3
2
nd
B1 data byte, DO’s 8-15
….
Byte 19
10
th
B1 data byte, DO’s 8-15
4. Begin scanning the JDO. Enter data that you want to send on the serial link. On receipt
of a change to the record number, the JDO will transmit the data. If any data is in the
receive buffer, the received data will be returned as a poll response. (If the sequence
number is the same as the previous response, the JDO will not re-send the string.)
2.4 How to Change the Node Address
1. Set the 6-position DIPswitch to the binary number representing the desired Node
Address, 0-63. (Note: Address 0 is often reserved for a Master device.)
2. Power cycle the unit by unplugging and reconnecting the DeviceNet cable.
NOTE:
T
he new address will not become effective until the unit is power cycled or a
Reset command is received from the Master.
2.5 How to Change the Baud Rate
The Baud Rate is set to Autobaud at the factory. The baudrate can be changed through your
configuration tool in its normal manner to any baudrate except Autobaud. This is due to the
fact that Autobaud is not provided for in the DeviceNet specification. If you need to set the
baudrate to Autobaud, you must do it via the parameter object. The definition is included in
the EDS file for easy configuration. Just use your configuration tool to access the device
parameters. The baudrate is parameter 7. Select the proper baudrate and upload the
parameter to the device. If your configuration tool does not support EDS parameter
configuration, you will have to perform the operation manually. To do this, set the parameter
Class 15 (F
hex
), instance 7, attribute 1 to the value in Table 2-5.
NOTE:
If you change the baudrate, the new baudrate will not become effective until the
unit is power cycled or a reset command is received by the Identity Object (Class 1,
Instance 0, reset).
Table 2-5
Baud Rate Selection
Baud Rate Value Baud Rate
0
125k
1
250k
2
500k
3
Autobaud
