FloBoss 107 Instruction Manual
5-6 Communications Revised June-2017
LEDs display the RX (receive) and TX (transmit) signals for EIA-232
(RS-232) communications.
The LOI supports ROC or Modbus slave protocol communications. The
LOI also supports the log-on security feature of the FB107, if you enable
security on the LOI using ROCLINK 800.
Table 5-1 shows the signal routing of the CPU and PC connections. The
FB107’s EIA-232 (RS-232) transmit (TX) connects to the PC’s receive
(RX).
Table 5-1. LOI Port Null-modem Cable Wiring
5.3.1 Using the LOI
1. Plug the LOI cable into the LOI connector on the top of the FB107
base unit.
2. Connect the LOI cable to the PC’s COM port.
3. Connect to ROCLINK 800 software and log in.
4. Click the Direct Connect icon.
5. Configure communications for the other built-in and modular
communications, I/O modules, AGA meter parameters, and other
configuration parameters.
5.4 Wiring EIA-485 (RS-485) Communications
The EIA-485 communications provides for RS-485 signals on:
COM1 port located on the CPU (labeled 485).
COM2 located on the CPU when a communications module is
installed in slot 2.
COM3 located on the EIA-485 (RS-485) communications module
installed in slot 1.
Table 5-2 shows termination points for EIA-485 (RS-485)
communications.
The EIA-485 (RS-485) serial communication allows baud rates from 300
to 115.2 Kbps with standard differential data transmissions over distances
of up to 1220 meter (4000 feet). The EIA-485 (RS-485) drivers are
designed for multi-point applications with multiple devices on a single
bus.