Status registers - GMP251

GMP251 User Guide

Document code
M211799EN
Revision
H
Language
English
Product
GMP251
Document type
User guide
Table 1. Modbus status registers (read-only)
Register number Address Description Data format Notes
2049 0800hex Device status 16-bit

0 = Status OK.

1 = Critical error.

2 = Error.

4 = Warning.

2050 0801hex CO2 status 16-bit

0 = Status OK.

2 = CO2 reading not reliable. Appears during transmitter start-up.

256 = Measurement not ready. Appears during transmitter start-up.

2052 0803hex Error code 32-bit field See table Error codes in register 0803hex below.
Table 2. Error codes in register 0803hex
Bitmask Error message Severity
0000hex Status OK.
0001hex Program memory crc critical error. Critical
0002hex Parameter memory crc critical error. Critical
0010hex Low supply voltage error. Error
0020hex Internal 30V error. Error
0040hex Low RX signal error. Error
0080hex Internal 8V error. Error
0100hex RX signal cut error. Error
1000hex Out of measurement range error. Error
2000hex Sensor heater error. Error
4000hex IR temperature error. Error
8000hex FPI slope error. Error
10000hex Internal 2.5V error. Error
20000hex Internal 1.7V error. Error
40000hex Low IR current error. Error

If several errors are active at the same time, the Modbus error code register contains the sum of currently active error codes.