Teledyne M300EM MODBUS Floating Point Holding Registers, Modbus, Description, Units, A-36

APPENDIX A-7: MODBUS Register MapTeledyne API - T300/T300M and M300E/EM PN 04906H (DCN5840)

MODBUS	Description	Units
Register Address
(dec., 0-based)
40	Diagnostic test input (TEST_INPUT_7)	mV
42	Diagnostic test input (TEST_INPUT_8)	mV
44	Diagnostic temperature input (TEMP_INPUT_4)	°C
46	Diagnostic temperature input (TEMP_INPUT_5)	°C
48	Ground reference (REF_GND)	mV
50	4096 mV reference (REF_4096_MV)	mV
52 1	Purge pressure	PSIG
54 1	Sample flow	cc/m
56 1	Vacuum pressure	"Hg
58 1	Internal box temperature #2/oven	°C
60 1	Internal box temperature #2/oven control duty cycle	Fraction
		(0.0 = off,
		1.0 = on full)
62 1	Auto-zero reading	M/R
100 2	O2 concentration	%
102 2	O2 concentration during zero/span calibration, just before computing	%
	new slope and offset
104 2	O2 slope	—
106 2	O2 offset	%
108 2	O2 sensor cell temperature	°C
200 3	CO2 concentration	%
202 3	CO2 concentration during zero/span calibration, just before	%
	computing new slope and offset
204 3	CO2 slope	—
206 3	CO2 offset	%
	MODBUS Floating Point Holding Registers
(32-bit IEEE 754 format; read/write in high-word, low-word order; read/write)
0	Maps to CO_SPAN1 variable; target conc. for range #1	Conc. units
2	Maps to CO_SPAN2 variable; target conc. for range #2	Conc. units
100 2	Maps to O2_TARG_SPAN_CONC variable	%
200 3	Maps to CO2_TARG_SPAN_CONC variable	%

A-36 04188D DCN5752