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T200H/M and 200EH/EM Menu Trees (05147H DCN6512) APPENDIX A-7: MODBUS Register Map
A-39
MODBUS
Register Address
(decimal,
0-based)
Description
10
Units
156
12
External analog input 5 slope eng unit /V
158
12
External analog input 5 offset eng unit
160
12
External analog input 6 value Volts
162
12
External analog input 6 slope eng unit /V
164
12
External analog input 6 offset eng unit
166
12
External analog input 7 value Volts
168
12
External analog input 7 slope eng unit /V
170
12
External analog input 7 offset eng unit
172
12
External analog input 8 value Volts
174
12
External analog input 8 slope eng unit /V
176
12
External analog input 8 offset eng unit
200
5
O
2
concentration %
202
5
O
2
concentration during zero/span calibration, just before computing
new slope and offset
%
204
5
O
2
slope —
206
5
O
2
offset %
208
5
O
2
sensor cell temperature °C
300
6
CO
2
concentration %
302
6
CO
2
concentration during zero/span calibration, just before
computing new slope and offset
%
304
6
CO
2
slope —
306
6
CO
2
offset %
308
6
CO
2
sensor cell temperature °C
MODBUS Floating Point Holding Registers
(32-bit IEEE 754 format; read/write in high-word, low-word order; read/write)
0 Maps to NOX_SPAN1 variable; target conc. for range #1 Conc. units
2 Maps to NO_SPAN1 variable; target conc. for range #1 Conc. units
4 Maps to NOX_SPAN2 variable; target conc. for range #2 Conc. units
6 Maps to NO_SPAN2 variable; target conc. for range #2 Conc. units
100
3
Maps to NOX_SPAN3 variable; target conc. for range #3 Conc. units
102
3
Maps to NO_SPAN3 variable; target conc. for range #3 Conc. units
200
5
Maps to O2_TARG_SPAN_CONC variable; target conc. for range
O
2
gas
%
300
6
Maps to CO2_TARG_SPAN_CONC variable; target conc. for range
CO
2
gas
%
MODBUS Discrete Input Registers
(single-bit; read-only)
0 Manifold temperature warning
1 Converter temperature warning
2 Auto-zero warning
3 Box temperature warning
4 PMT detector temperature warning
07270B DCN6512