11
MODBUS OVER SERIAL LINE
Interface
Baud rate 9600
Format (bits) 8 data, No parity, 1 stop
Reply delay 20 ms
Supported Functions
Read register 0x03, 0x04
Write single register 0x06
Write multiple register 0x10
List of Modbus Addresses
The list below includes all available addresses:
R = Read, W = Write
Address Length (words) Description R/W
0x00 1 Sensor Type
21 = PUA8, 22 = PUA2, 23 = PUA5
R
0x01 1 Field of view:
PUA8: 0 = 30:1, 1 = CF
PUA2: 0 = 15:1, 1=25:1, 2 = 75:1
PUA5: 0 = 25:1
R
0x02 2 Serial number R
0x04 1 Temperature range (PUA2 only):0 = LT, 1 = PT,
2 = MT, 3 = HT
R
0x05 1 Modbus slave address R/W
0x06 1 Reflected Energy Compensation
0 = Off, 1 = On
R/W
0x07 1 Reflected Temperature R/W
0x08 1 Emissivity (1 LSB = 0.0001)
Minimum 0.1000, Maximum 1.0000
R/W
0x09 1 Window Transmissivity (1 LSB = 0.0001)
Minimum 0.2000, Maximum 1.0000
For when using the sensor with an IR window
R/W
0x0A 1 Output Scale: Temperature at 4 mA R/W
0x0B 1 Output Scale: Temperature at 20 mA R/W
0x0C 1 Hold Mode
0 = Off, 1 = Peak, 2 = Valley
R/W
0x0D 1 Hold Period (1 LSB = 0.1 seconds)
Minimum 0, maximum 1200.0 s
R/W
0x0E 1 Average Period (1 LSB = 0.1 seconds)
Minimum 0, maximum 60.0 s
R/W
0x0F 1 Average Temperature R
0x10 1 Minimum Temperature R
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