Xylem Expert 7060_7070_Modbus - Manual (Page 12)

Communication protocol Serie30
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Some examples:
address request response received value
250 250 73 1 161 167 250 73 63 109 186 172 0 26 27 0.9286296 bar Read P1
1 1 73 1 80 214 1 73 63 109 177 83 0 231 97 0.9284870 bar
Read P2 1 1 73 2 81 150 1 73 63 109 178 242 0 119 232 0.9285117 bar
250 250 73 4 162 103 250 73 65 201 184 0 0 224 204 25.21484 °C Read
TOB1 1 1 73 4 83 22 1 73 65 202 81 128 0 95 54 25.28979 °C
Initialize 1 1 48 52 0 1 48 5 20 FW=5.20-5.50,
Buffer=10, device
already initialized
5.2 Function 30: Read coefficient
Request:
DevAddr 30 Nr. CRC16_H CRC16_L
Response:
DevAddr 30 B3 B2 B1 B0 CRC16_H CRC16_L
Exception errors:
2 if no. > 111
3 if message length incorrect
32 if device is not yet initialised
Note:
Every coefficient can be read in IEEE754 format (floating-point format 4-byte B0 .. B3) via this function.
Æ
Information on IEEE754: see appendix.
5.2.1 Calibration values
No. Description of coefficient Unit
53 Threshold value of the roof function bar
64 Offset of pressure sensor P1 bar
65 Gain factor of pressure sensor P1
66 Offset of pressure sensor P2 bar
67 Gain factor of pressure sensor P2
68 Offset of analogue output bar
69 Gain factor of analogue output
70 Offset of CH0
71 Gain factor of CH0
72 Upper threshold value for switching output 1**
73 Lower threshold for switching output 1**
78 Upper threshold value for switching output 2**
79 Lower threshold for switching output 2**
100… 111 free coefficients for customer use
** no longer supported for devices 5.20-10.XX and newer.
The calibration values can be read and written.