Instruction manual

10 RFT9739 Field-Mount Transmitter Instruction Manual
Getting Started
continued
Table 2-2. Communications configuration
Instructions
Before beginning, make note of the positions of switches 1, 2, and 3. Then, for each setting:
1. Begin with switch 10 in the CONFIG position, and switches 1 through 6 in the OFF position. The LED flashes ON 3 times and
pauses, which indicates the transmitter is in the communication configuration mode.
2. Set designated switches to the ON position as indicated below.
3. Press and hold the ZERO button for five seconds, until the LED remains ON for 3 seconds, which indicates the setting has
been accepted by the transmitter.
When done:
1. Reset switches 1, 2, and 3 to the appropriate positions.
2. Set switch 5 to the USER DEFINED position.
3. Set switches 4 and 6 to the OFF position.
4. Set switch 10 to the OPERATE position.
Note
If switches 4, 5, 6, and 10 are left in the ON position after configuration, a master reset will occur the next time power to the
transmitter is shut off and then restored. To avoid an unexpected master reset, make sure switches 4, 6, and 10 are left in the
OFF position after configuration.
Baud rate
Switch
1
Switch
2
Switch
3
Switch
4
Switch
5
Switch
6
1200 baud ON ON
2400 baud ON ON ON
4800 baud ON ON
9600 baud ON ON ON
19,200 baud ON ON ON
38,400 baud ON ON
Stop bits and parity
Switch
1
Switch
2
Switch
3
Switch
4
Switch
5
Switch
6
1 stop bit, no parity ON
1 stop bit, odd parity ON ON
1 stop bit, even parity ON ON ON
2 stop bits, no parity ON ON
2 stop bits, odd parity ON ON ON
2 stop bits, even parity ON ON
Data bits, protocol, physical layer
Switch
1
Switch
2
Switch
3
Switch
4
Switch
5
Switch
6
HART on primary mA ON ON ON ON
HART on RS-485 ON ON ON
Modbus RTU mode (8 bits) on RS-485 ON ON
Modbus ASCII mode (7 bits) on RS-485 ON ON ON
Modbus RTU mode (8 bits) on RS-485
and HART on primary mA
ON ON ON
Modbus ASCII mode (7 bits) on RS-485
and HART on primary mA
ON ON ON ON