Instruction manual

RFT9709 Transmitter Instruction Manual

Appendix

C Switch Settings

C.1 Configuration switches

Switches on the RFT9709 (see Figure C-1) control the following

transmitter functions:

• Communications settings

• mA output settings

• Zeroing method

• Security

Figure C-1.

Switches

C.2 Communication settings

Switch 5 enables the user to choose the standard communication

configuration, or user-defined parameters. With switch 8 in the ON

(CNFG) position, switches 1 through 6 can be used for setting user-

defined communication parameters.

Standard communication setting

To use the standard communication configuration, set switch 5 to the

STD position. Setting the switch in this position establishes the following

communication parameters:

• HART protocol, at 1200 baud, on the primary-variable (PV) mA output

• Modbus protocol, in RTU mode (8 bit), at 9600 baud, on the RS-485

output

• 1 stop bit, odd parity

User-defined communication settings

To establish user-defined settings, set switches as instructed in

Table C-1, page 48. In the user-defined setting, until they are changed or

after a master reset, communication parameters match those listed

above.

1 2 3 4 5 6 7 8

Switches at left shown in

OFF position.

Switch

number

Switch position

OFF ON

1 OFF SEC1

2 OFF SEC2

3 OFF SEC3

5STDUSR

7DOWNUP

8OPCONFIG

09switch.fm Page 47 Tuesday, March 2, 1999 9:36 AM