Status Registers; Test Value Registers; Table 16 Modbus Status Registers (Read-Only); Table 17 Modbus Test Registers (Read-Only) - Vaisala CARBOCAP GMW80 Series User Manual

A.3.2 Status registers
Table 16 Modbus status registers (read-only)
Register Address
number
513 0200
hex
514 0201
hex
519 0206
hex
520 0207
hex
1) Device internal temperature measurement. Measurement accuracy not specified.
2) Applicable to CO
A.3.3 Test value registers
Read the known test values from the test registers to verify the functionality of your Modbus
implementation.
Table 17 Modbus test registers (read-only)
Register Register
number address
7937 1F00
hex
7938 1F01
hex
7940 1F03
hex
Register description
Device status
Error code
Temperature
measurement status
CO measurement
2
status
measurement only.
2
Register description
Signed integer test
Floating point test
Text string test
Data Notes
format
16-bit 0000
integer
are returned, see
Solving typical problems (page
32-bit Used by Vaisala Technical Support
integer when solving device problems
16-bit 0000
integer
1)
0004
0008
0080
0100
Data
format
16-bit
integer
32-bit
float
text
Appendix A – Modbus reference
: Status OK; if other values
hex
Table 6 (page 41)
: Status OK
hex
: Under range
hex
: Over range
hex
: Sensor failure
hex
: Measurement not ready
hex
Test value
-12345
-123.45
Text string: "-123.45"
in
39).
2)
51