System integration
LPGmass Modbus RS485
36
Hauser
9
System integration
9.1
Overview of device description files
9.1.1
Current version data for the device
Firmware version
01.03.zz
• On the title page of the Operating instructions
• On the transmitter nameplate
• Firmware version
Diagnostics → Device information → Firmware
version
Release date of firmware version
10.2014
---
For an overview of the different firmware versions for the device
9.1.2
Operating tools
The suitable device description file for the individual operating tools is listed in the table
below, along with information on where the file can be acquired.
FieldCare
•
→ Download Area
• CD–ROM (contact Hauser)
• DVD (contact Hauser)
DeviceCare
•
→ Download Area
• CD–ROM (contact Hauser)
• DVD (contact Hauser)
9.2
Modbus RS485 information
9.2.1
Function codes
Function codes are used to define which read or write action is carried out via the Modbus
protocol. The measuring device supports the following function codes:
Code
Name
Description
Application
03
Read holding
register
Master reads one or more Modbus
registers from the device.
A maximum of 125 consecutive
registers can be read with 1
telegram: 1 register = 2 bytes
The measuring device does
not make a distinction
between function codes 03
and 04; these codes therefore
yield the same result.
Read device parameters with read
and write access
Example:
Read mass flow
04
Read input
register
Master reads one or more Modbus
registers from the device.
A maximum of 125 consecutive
registers can be read with 1
telegram: 1 register = 2 bytes
The measuring device does
not make a distinction
between function codes 03
and 04; these codes therefore
yield the same result.
Read device parameters with read
access
Example:
Read totalizer value