Table of Contents
Advertisement
Barometric Pressure
In all probes, barometric pressure is required for barometer compensated ODO percent saturation calculations. The barometric
pressure value is set by writing an entire block of values (non-divisible) using a write multiple registers command (function code
0x10). This information can be broadcast to all devices on the network and updated periodically. The default is 760.0 or the last
calibration value given, if available.
Address
Description
0x0404
User Barometric Pressure Value (mmHg) [3:0]
0x0405
Request
Function Code
Register Address
Number Registers
Byte Count
Register Values
Modbus Configuration & Commands
1 byte
2 bytes
2 bytes
1 byte
4 bytes
0x10
0x0404
0x0002
0x04
User Barometric Pressure Value (mmHg) [3:0]
27
R/W
Type
Default
760.0 or last
RW
Float
value from
calibration
Advertisement
Table of Contents
