Address
(Decimal)
Address
(Hexadecimal)
Register Description Data
Format
Notes
529 0210
hex
Status of Hydrogen
peroxide concentration
by volume
16-bit 0 = Status OK.
2 = Reading is not
reliable.
32 = Reading is locked
during purge.
128 = Sensor failure.
256 = Measurement not
ready
1)
530 0211
hex
Status of H
2
O+H
2
O
2
relative saturation
16-bit
531 0212
hex
Status of Temperature 16-bit
532 0213
hex
Status of Relative
humidity
16-bit
533 0214
hex
Status of Absolute
hydrogen peroxide
16-bit
536 0217
hex
Status of Water
concentration by volume
16-bit
537 0218
hex
Status of Water vapor
pressure
16-bit
538 0219
hex
Status of Absolute
humidity
16-bit
539 021A
hex
Status of Water vapor
saturation pressure
16-bit
540 021B
hex
Status of Temperature
from the temperature
probe
16-bit
1) Multiple statuses can be present simultaneously. In those cases, the value of the status
register is the sum of the status values. For example the value of the device status register is
6 if a warning (4) and an error (2) are present simultaneously.
Table 16 Error Codes in Register 0201
hex
(32-bit)
Value of
Register
0201
hex
Error Message Severity
0 Status OK.
1 Firmware checksum mismatch. Critical
2 Device settings corrupted. Critical
8 Supply voltage too high. Error
16 Internal voltage too low. Error
32 Internal voltage too high. Error
64 Humidity sensor failure (open circuit). Error
Appendix A – Modbus Reference
55
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