Status Registers (Read-Only); Configuration Registers; Table 43 Status Registers; Table 44 Configuration Parameter Registers - Vaisala PTU300 User Manual

Appendix C ______________________________________________________ MODBUS Reference
NOTE
VAISALA ______________________________________________________________________ 211

Status Registers (Read-Only)

Table 43 Status Registers
Name
Fault status
Online status
Pressure stability
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 PTU300 transmitter is also available with
the Read Exception Status function code 07. For details, see section
Exception Status Outputs on page 212.

Configuration Registers

Configuration parameter registers are used to configure the measurement.
Writing out-of-range values is silently ignored.
Table 44 Configuration Parameter Registers
Name
Pressure setting default
value
Pressure setting
temporary value
Chemical purge interval
Molecular weight for
ppm calculation
w
QNH height
QFE height
HCP height
Maximum pressure
change
Maximum pressure
difference
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.
Address
0513
0514
0515
0516
0517
Float Integer
0769...0770 1025 (×1)
0771...0772 1026 (×1)
0773...0774 1027 (×1)
0775...0776 1028 (×0.001)
0781...0782 1031 (×0.1)
0783...0784 1032 (×0.1)
0785...0786 1033 (×0.1)
0787...0788 1034 (×0.01)
0789...0790 1035 (×0.01)
Description
1 = No errors
1 = Online data available
1 = OK
Bit field that represents the
error codes listed in Table 35
on page 160. 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
-30...3000 m
±30 m
±30 m
0...10 hPa
0...10 hPa