150
Preset Single Register
The Preset Single Register function code (0x06) is used to change the contents of a single register within the
Viltech controller. Any register within the Control Message and Setpoint Messages may be changed as long as the
address and data are within the valid range.
The following table is an example of the use of the Preset Single Register function code for changing the value
of the S1 Suction Pressure Control Setpoint to 0 PSIG
(14.7 PSIA) using Modbus word address 40202.
Preset Multiple Registers
The Preset Multiple Registers function code (0x10) is used to change the contents of one or more registers within
the Viltech controller. Any group of registers within the Control Message and Setpoint Messages may be changed
as long as the number of registers addressed does not extend beyond the valid range.
The following table is an example of the use of the Preset Multiple Registers function code for changing the value
of the S1 Suction Pressure Control Setpoint to 0 PSIG
(14.7 PSIA) using Modbus word address 40202 (Viltech word address 201).