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Modbus
174
Data format example
Data format example
Data format example
Length
Data
format
Remarks
Length
Data
format
Remarks
4
clk
[0]: Upper 8 bits = Year (lower 2
digits)
35
mes_dat
[0-3]: Date/time (clk)
Lower 8 bits = Month
[4]: Line (byte)
[1]: Upper 8 bits = Day
[5]: Element (byte)
Lower 8 bits = Week [0=SUN,
6=SAT]
[6-7]: Water quality (hval_t)
[2]: Upper 8 bits = Time
[8-9]: Water quality before
compensation (hval_t)
Lower 8 bits = Minute
[10]: Water quality alarm (short)
[3]: Upper 8 bits = Second
[11]: Constantly 0
Lower 8 bits = Dummy
[12-14]: RevisionA (wval_t)
2
hval_t
[0]: Data
[15]: Constantly 0
[1]: Upper 8 bits = Digit
[16-18]: RevisionB (wval_t)
Lower 8 bits = Unit
[19]: Constantly 0
3
wval_t
[0]: Data Lo
[20-22]: Abs[0] (wval_t)
[1]: Data Hi
[23]: Constantly 0
[2]: Upper 8 bits = Digit
[24-26]: Abs[1] (wval_t)
Lower 8 bits = Unit
[27]: Constantly 0
3
mes_info
[0]: Mesctl status number
[28-30]: Abs[2] (wval_t)
[1]: Measurement line
[31]: Constantly 0
[2]: Reserved
[32]: Alm_Abs[0] (short)
25
alm_info
[0-3]: Same as clk
[33]: Alm_Abs[1] (short)
[4]: Number of alarms
[34]: Alm_Abs[2] (short)
[5-12]: Common alarm (bit
assignment)
20
hour_rep_
dat
[0-3]: Date/time (clk)
[13-14]: Line 01 alarm (bit
assignment)
[4]: Line (byte)
[15-16]: Line 02 alarm (bit
assignment)
[5]: Element (byte)
[17-18]: Line 03 alarm (bit
assignment)
[6]: Unit system (byte)
[19-20]: Line 04 alarm (bit
assignment)
[7]: Constantly 0
[21-22]: Line 05 alarm (bit
assignment)
[8-10]: Flow rate (wval_t)
[23-24]: Line 06 alarm (bit
assignment)
[11]: Flow rate alarm (short)
2
seq_info
[0]: Sequence number
[12-13]: Water quality (hval_t)
[1]: Sequence time
[14]: Water quality alarm (short)
1
dout_t
[0]: Upper 8 bits = Mode
[15]: Constantly 0
[Hold/Direct/Preset]
[16-18]: Payload (wval_t)
Lower 8 bits = Preset value
[19]: Payload alarm (short)
Содержание TPNA-500
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