Emerson Process Management MICRO MOTION 2400S - Manual (Page 79)

Configuration and Use Manual 71
Optional Configuration
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8.10.2 DeviceNet baud rate
The default baud rate for the Model 2400S DN transmitter is 125 kBaud . Valid baud rates are listed in
Table 8-11.
The baud rate can be set using a digital communications hardware switch or a DeviceNet tool. If the
device cannot determine what its baud rate should be, it defaults to 500 kBaud.
Note: You cannot set the baud rate from ProLink II or the display.
To set the baud rate using the digital communications hardware switch:
1. Remove the transmitter housing cover as described in Section 3.3.
2. Identify the baud rate switch (the right switch) on the user interface module of your
transmitter. See Section 3.3.
3. Insert a small blade into the slot on the switch and rotate the arrow to the desired position. See
Table 8-11 for the baud rate codes. The arrow should point to the code representing the desired
baud rate.
4. Replace the transmitter housing cover.
5. Either power cycle the transmitter or send a Reset service (0x05) to the Identity Object (0x01),
Instance 1.
Note: The new baud rate is not implemented until Step 5 is completed.
To set the baud rate using a DeviceNet tool:
1. Use the digital communications hardware switch to set the baud rate to any value in the
Program range (values 3–9 ). This essentially disables the digital communications hardware
switch and allows external control of the baud rate.
2. Set the baud rate in the DeviceNet Object (0x03), Instance 1, Attribute 2, data type USINT.
Note: If the baud rate digital communications hardware switch is not in the Program range, the Set
service will return the error code 0x0E (Attribute Not Settable).
3. Either power cycle the transmitter or send a Reset service (0x05) to the Identity Object (0x01),
Instance 1.
Note: The new baud rate is not implemented until Step 3 is completed.
8.10.3 DeviceNet configurable input assembly
The Model 2400S transmitter provides 25 predefined input assemblies and one configurable input
assembly. The configurable input assembly allows you to specify five process variables to be
published to the network.
Note: For a listing of the predefined input assemblies and the default values for the configurable input
assembly, see Table 7-2.
Table 8-11 Baud rate codes
Switch position Baud rate
0 125 kBaud
1 250 kBaud
2 500 kBaud
3–9 (Program range) Controlled by DeviceNet system