User guide

Communication protocol Serie30 Page 13/37
4.9 MODBUS Register Map
Process Value Read Range (0x000x):
• compatible with Class.Group-Version = 5.20-10.XX and former
• format is float according to chapter “6.2 floating-point format IEEE754”, channel error returns NaN, over-/underflow is
represented by +/-infinity
• corresponding functionality to Keller Bus functions F73
MODBUS StAdd
(0xHILO)
Channel Read/
Write
Unit Description
0x0000 Calculated value (customer specific format) HWord
CH0 R ---
Calculated value (customer specific format) LWord
0x0002 Pressure of sensor1 HWord
P1 R bar
Pressure of sensor1 LWord
0x0004 Pressure of sensor2 HWord
P2 R bar
Pressure of sensor2 LWord
0x0006 Temperature HWord
T R °C
Temperature LWord
0x0008 Temperature of sensor1 HWord
TOB1 R °C
Temperature of sensor1 LWord
0x000A Temperature of sensor2 HWord
TOB2 R °C
Temperature of sensor2 LWord
Process Value Read Range (0x001x):
• compatible with Class.Group-Version = 5.20-10.XX and later (4 instead of 2 byte signed integers)
• Overflow returns “2147483647”, an underflow “-2147483648”
• format is 4 byte signed integer
• corresponding functionality to Keller Bus functions F74
MODBUS StAdd
(0xHILO)
Channel Read/
Write
Unit Description
0x0010 Calculated value (customer specific format) HWord
CH0 R ---
Calculated value (customer specific format) LWord
0x0012 Pressure of sensor1 HWord
P1 R 1/100 mbar
Pressure of sensor1 LWord
0x0014 Pressure of sensor2 HWord
P2 R 1/100 mbar
Pressure of sensor2 LWord
0x0016 Temperature HWord
T R 1/100 °C
Temperature LWord
0x0018 Temperature of sensor1 HWord
TOB1 R 1/100 °C
Temperature of sensor1 LWord
0x001A Temperature of sensor2 HWord
TOB2 R 1/100 °C
Temperature of sensor2 LWord
Process Value Read Range (different mapping) (0x0100):
• compatible with Class.Group-Version = 5.20-10.XX and later
• format is float according to chapter “6.2 floating-point format IEEE754”, channel error returns NaN, over-/underflow is
represented by +/-infinity
• used for accessing data in one cycle (e.g. P1 and TOB1)
MODBUS StAdd
(0xHILO)
Read/
Write
Reg.
Name
DESCRIPTION
0x0100 Pressure of sensor1 [bar] HWord
R P1
Pressure of sensor1 [bar] LWord
0x0102 Temperature of sensor1 [°C HWord
R TOB1
Temperature of sensor1 [°C] LWord
0x0104 Pressure of sensor2 [bar] HWord
R P2
Pressure of sensor2 [bar] LWord
0x0106 Temperature of sensor2 [°C] HWord
R TOB2
Temperature of sensor2 [°C] LWord