Chapter 4 – Communications
Page 52 TestEquity F4T Controller
Manual Ramp Parameters (Ramp to Set Point without a profile)
Ramp Action (Temperature) W 2794, ## (where ## is one of the four choices below)
Off = 62
Startup = 88
Set Point = 85
Both = 13
Ramp Scale (Temp. °/Minutes) W 2796, 57
Ramp Scale (Temp. °/Hours) W 2796, 39
Ramp Rate (Temperature) WF 2798, value (0 to 99,999)
Programming Syntax for the F4T Controller, Data Map 2
The following applies if the F4T serial interface is configured for Data Map 2, F4 Compatibility
Mode. See register numbers on the previous page. This only applies for programming through
the GPIB or Ethernet Modbus converters. F4 Compatibility mode is not yet implemented with
versions of the F4T that have Cascade Control (part temperature control)
Modbus Register Read / Write Commands
R? reg, n Read register command
Reg = Modbus register
n = number of registers to send
W reg, data Write register command
Reg = Modbus register
Data = ASCII data written as 16-bit decimal value
Examples:
Write Temperature Set Point W 300, value
Write Humidity Set Point W 319, value
Read Chamber Temperature R? 100, 1
Read Chamber Humidity R? 104, 1
Event 1 ON W, 2000, 1
Event 1 OFF W, 2000, 0
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