Chapter 3 – Communications
Page 14 TestEquity F4T Controller
RS-232 Parameters
This section describes how to configure the RS-232 Modbus Communications settings in the
F4T controller.
Changing RS-232 Parameters
1. Press the Menu, Settings and Network buttons, in that order.
2. Under Communications Channels press Modbus.
3. Change desired settings.
4. Recycle the power to put the new settings into effect.
RS-232 Parameters and Settings
The bracketed bold settings below represent the defaults as delivered from the factory:
• Modbus Address: [1]
- Each device is given a unique address. Up to 247 devices can be on the same data
link.
• Baud Rate: [9600]
- Must match the baud rate of your computer’s serial port and software.
• Parity: [None]
- Must match the parity of your computer’s serial port and software.
• Display Units: °F, °C [configured by TestEquity for °C]
• Modbus Word Order: [Low High], High Low
- Modbus allows a user to select the word order of two 16-bit words in floating point
values.
• Data Map: [1], 2, 3
- Data Map, the user can switch Modbus registers from the comprehensive listing of
F4T registers.
- Map 1 = F4T registers (default)
- Map 2 = Not applicable to controllers with Cascade Control (Part Temperature
Control)
- Map 3 = For controllers with Cascade Control. Limited set of F4 compatible registers
(for compatibility with software written for the F4).
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