Teledyne T400 User Manual page 174

APPENDIX A-7: MODBUS Register Map
MODBUS
Register Address
(dec., 0-based)
4
138
4
140
4
142
4
144
4
146
4
148
4
150
4
152
4
154
4
156
4
158
4
160
4
162
4
164
4
166
4
168
4
170
4
172
4
174
4
176
(32-bit IEEE 754 format; read/write in high-word, low-word order; read/write)
0
2
4
6
0
1
2
3
4
5
6
7
8
9
A-2
External analog input 2 slope
External analog input 2 offset
External analog input 3 value
External analog input 3 slope
External analog input 3 offset
External analog input 4 value
External analog input 4 slope
External analog input 4 offset
External analog input 5 value
External analog input 5 slope
External analog input 5 offset
External analog input 6 value
External analog input 6 slope
External analog input 6 offset
External analog input 7 value
External analog input 7 slope
External analog input 7 offset
External analog input 8 value
External analog input 8 slope
External analog input 8 offset
MODBUS Floating Point Holding Registers
Maps to O3_TARG_ZERO1 variable; target zero concentration for
range #1
Maps to O3_SPAN1 variable; target span concentration for range #1
Maps to O3_TARG_ZERO2 variable; target zero concentration for
range #2
Maps to O3_SPAN2 variable; target span concentration for range #2
MODBUS Discrete Input Registers
(single-bit; read-only)
O generator reference detector warning
3
O generator lamp intensity warning
3
O generator lamp temperature warning
3
O scrubber temperature warning
3
Photometer reference warning
Photometer lamp stability warning
Photometer lamp temperature warning
Box temperature warning
Sample temperature warning
Sample flow warning
Teledyne API - Models T400 and 400E (04402G DCN6874)
Description Units
eng unit /V
eng unit
Volts
eng unit /V
eng unit
Volts
eng unit /V
eng unit
Volts
eng unit /V
eng unit
Volts
eng unit /V
eng unit
Volts
eng unit /V
eng unit
Volts
eng unit /V
eng unit
Conc. units
Conc. units
Conc. units
Conc. units
083730400A DCN8130