Configuration Registers; Table 39 Status Registers; Table 40 Configuration Parameter Registers - Vaisala HUMICAP HMT330 SERIES User Manual

Appendix C ______________________________________________________ MODBUS Reference
NOTE
VAISALA ______________________________________________________________________ 199
Status Registers (Read-Only)
Table 39 Status Registers
Name
Fault status
Online status
Error code (bits 15...0)
Error code (bits 31...16)
Error information can retrieved also with function code 08, sub-function
02.
Basic status information of the HMT330 transmitter is also available with
the Read Exception Status function code 07. For details, see section
Exception Status Outputs on page 200.

Configuration Registers

Configuration parameter registers are used to configure the measurement.
Writing out-of-range values is silently ignored.
Table 40 Configuration Parameter Registers
Name
Pressure setting default
value
Pressure setting
temporary value
Chemical purge interval
Molecular weight for
ppm calculation
w
If you modify the pressure setting repeatedly, modify the temporary
value at register 0771...0772 (1026) instead of the permanent setting at
register 0769...0770 (1025). Set the temporary value to zero to return to
the default pressure setting.
Non-metric units are not available on MODBUS. If they are needed,
calculate the conversion outside the transmitter.
Address
0513
0514
0516
0517
Float Integer
0769...0770 1025 (×1)
0771...0772 1026 (×1)
0773...0774 1027 (×1)
0775...0776 1028 (×0.001)
Description
1 = No errors
1 = Online data available
Bit field that represents the
error codes listed in Table 32
on page 152. Active errors are
set to 1. For example, if bit 14
is set to 1, error code E14 is
active.
Valid Range
0...9999 hPa
0...9999 hPa
10...2880 min
0...999.999
g/mol