Union Instruments CWD3000 EXP - Appendix; Profibus Data Structure

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16 Appendix
Profibus data structure
No. Type Bytes Bytes tot. Name Description Source
1 FLOAT 4 4 Heating value Unit: kJ/m³ CWD
5
2 FLOAT 4 8
Combustion
value
Unit: kJ/m³ CWD
3 FLOAT 4 12 Wobbe i Lower Wobbe index: Unit: kJ/m³ CWD
4 FLOAT 4 16 Wobbe s Upper Wobbe index: Unit: kJ/m³ CWD
5 FLOAT 4 20 Dv Relative density, dimensionless CWD
6 FLOAT 4 24 Reserve CWD
7 FLOAT 4 28 Reserve CWD
8 FLOAT 4 32 Tin Air temp. CWD thermal element, unit: °C CWD
9 FLOAT 4 36 CO
Unit: % (only present with CWDs with CO
module)
CWD
10 FLOAT 4 40 Air min
Min. air requirement, unit: m³ air/m³ gas
(only with customer-specific CWDs)
CWD
11 FLOAT 4 76 Reserve CWD
…
20 FLOAT 4 80 Fixer test value Sent: 12345.6789 CWD
21 BYTE 1 81 Operating state
Current CWD operating state:
0 – Stop
1 – Process
2 – Ignition
3 – Ignition break
4 – Fault
5 – Overtemperature
6 – Measurement range 1 calibration
7 – Measurement range 2 calibration
8 – Measurement range 3 calibration
9 – Test gas measurement (in process
only)
CWD
22 BYTE 1 82
Filter change
status
1 = filter change required on CWD CWD
23 BYTE 1 92 Reserve CWD
Table 1: Profibus data structure
For additional information on communication with Profibus and the UNION
calorimeter, see UNION Instruments GmbH service,
 Chapter 11, Service.
5
CWD = calorimeter