ProSoft Technology MVI69-HART - Manual (Page 44)

Module Configuration MVI69-HART ♦ CompactLogix Platform
User Manual HART Multi-drop Master Communication Module
Page 44 of 169 ProSoft Technology, Inc.
March 29, 2012
2.3.2 Example of HART Command Function 34
The following example shows how to configure a command function 34 (WRITE
DAMPING VALUE) to write a damping values (seconds) to the HART slave
device.
According to the HART specification, this command will write one floating point
variables:
Word High Byte Low Byte
0 Floating Point Damping Value (Sec)
1
The HART device should also return the floating point value after it processes the
request:
Word High Byte Low Byte
0 Floating Point Damping Value (Sec)
1
The HART device also returns an integer status data:
Word High Byte Low Byte
1 STATUS WORD
This command will return the following number of words:
Parameter Data Type Direction Number of
Words Database Address
(this example)
Damping Value Floating Point Written from MVI to slave 2 (4 bytes) 400 (word address)
or 800 (byte
address)
Damping Value Floating Point Read from slave to MVI 2 240 (word address)
Status Word Integer Read from slave to MVI 1 290 (word address)