Dynasonics TFXP Series Transit Time Ultrasonic Flow Meter - Manual (Page 73)

Rev. 5/09
-3.35- TFXP
ISO-MOD:
RS485
Module
(Optional) RS485 -- RS485 (Choices and Values)
RS485 Mode (RS485 MO)
1. Slave (SLAVE)
2. Master (MASTER)
Baud Rate (RS485 BA)
1. 1200 Baud (1200)
2. 2400 Baud (2400)
3. 9600 Baud (9600)
4. 19,200 Baud (19200)
Device Address (Addr)
(1-127)
The RS485 module allows up to 126 TFX systems to be daisy-
chained on a single three-wire cable network. Communications are
through a proprietary digital protocol, detailed in the Appendix of this
manual. All meters are assigned a unique one byte serial number
that allows all of the meters on the cable network to be accessed
independently. Baud rates up to 19.2k and cable lengths to 5,000
feet (1,500 meters) are supported without the need for repeaters.
RS485 MO
Select Slave for all of the TFX meters connected to the unit
designated as Master.
RS485 BA
Select a Baud rate that is compatible with the operating system.
ADDRESS
Each TFX connected on the communications bus must have a
unique address number assigned. Address 127 is a universal
address that will result in all TFX instruments on the network
responding simultaneously – regardless of address – resulting in
CRC errors. Only select address location 127 if one meter is on the
network.
RS485
Mode
RS485
Baud Rate
RS485
Address
PART 3 - KEYPAD CONFIGURATION