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PF2100 MODBUS REGISTER MAP | PROFIRE ENERGY INC.
READ/WRITE HOLDING REGISTERS
These are 2-byte read/write values. Setpoints are checked to be within range before being accepted. To verify that a setpoint is accepted, read
back the setpoint registers in 30008 -30010 or 40008-40010. See the Modbus Manual for recommended procedures.
Use the “Preset Single Register” command (0x06) or the “Preset Multiple Registers” command (0x10) to write these registers.
Use the “Read Holding Registers” command (0x03) to read these registers.
Example 1: Write Single
Writing 1 register starting from Register Offset 100 will require two data bytes to be sent.
The first byte will be the most significant byte of Register Offset 100 and the second byte
will be the least significant byte.
Example 2: Write Multiple
Writing 2 registers starting from Register Offset 100 will require four data bytes to be sent. The first byte will be the most significant byte of
Register Offset 100 and the second byte will be the least significant byte. The next two bytes will contain the value of Register Offset 101.
REGISTER
ADDRESS/
OFFSET NAME AND VALUES VALUES DESCRIPTION VER.
40100
(99)
Write Command Register
Set register to decimal 1234 to start unit
Set register to decimal 4321 to stop unit
0,
1234,
4321
This register is used to remotely stop or start the
PF2100, and will clear when the command is
accepted.
2.0+
40101
(100)
High Fire/Process Setpoint Change
Request
0 to
1350°C *
This register is used to request the PF2100 to change
the HF SP to the specified value, and will clear when
the setpoint is accepted. Read register 30008/40008 to
verify that the change was accepted.
2.0+
40102
(101)
Low Fire Setpoint Change Request 0 to
1350°C *
This register is used to request the PF2100 to change
the LF SP, and will clear when the setpoint is accepted.
Read register 30009/40009 to verify that the change
was accepted.
2.0+
40103
(102)
Pilot Off Setpoint Change Request 0 to
1350°C *
This register is used to request the PF2100 to change
the PO SP, and will clear when setpoint is accepted.
Read register 30010/40010 to verify that the change was
accepted.
2.0+
* Note that a setpoint cannot be set above/below the setpoint that bounds it above/below.
These thermocouple settings are all encoded using 16-bit signed integers and are always reported in °C even if the PF2100 is set to display temperature in Fahrenheit.
Data Byte 0
REG OFF 3 MSB
Data Byte 1
REG OFF 3 LSB
Data Byte 0
REG OFF 3 MSB
Data Byte 1
REG OFF 3 LSB
Data Byte 2
REG OFF 4 MSB
Data Byte 3
REG OFF 4 LSB
(9 pages)
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