
PLX51-HART-4I / PLX51-HART-4O
♦
HART Input/Output
Setup
Multidrop Field Devices
User Manual
ProSoft Technology, Inc.
Page 36 of 127
Modbus
Parameter
Description
For example, if the source data offset entered is 20 and the custom HART
commands is on HART channel 0, then the HART message data to be sent will
start at Modbus HR 5020 (HR 5000
for HART channel 0
+ offset HR 20).
Source Data
Length
This is the length of the HART data to be sent in bytes.
NOTE:
A value of zero will result in no additional HART data being sent with
the HART command.
Reply Offset
The reply offset parameter is the location in the Modbus HR range where the
HART data returned (from the custom HART command) is stored.
For example, if the reply offset entered is 40 and the custom HART commands
is on HART channel 1, then the HART message data returned will start at
Modbus HR 5290 (HR 5250
for HART channel 1
+ offset HR 40).
See the Custom HART message operation section for details regarding the
format of the reply data.