Rockwell Automation 20-COMM-H RS485 HVAC Adapter FRN 2.xxx - Manual (Page 66)

6-10 Using Siemens Building Technologies P1 FLN
20-COMM-H RS-485 HVAC Adapter User Manual
Publication 20COMM-UM009D-EN-P
Writing Parameter Values
Configurable Points USER OUT (point 39) and PARAM OUT (point 38)
are points that enable write access to any parameter in the drive. However,
due to the 15-bit limitation, only 16-bit drive parameters should be
accessed.
For example, for a PowerFlex 70/700 drive, writing a value of “140” in
PARAM OUT (writing drive parameter 140) and the value of “200” in
USER OUT would set drive Parameter 140 - [Accel Time 1] to 20.0
seconds.
!
ATTENTION: Risk of equipment damage exists. If
configurable points are programmed to write parameter data to
Non-Volatile Storage (NVS) frequently, the NVS will quickly
exceed its life cycle and cause the drive to malfunction. Do not
create a program that frequently uses configurable points to write
parameter data to NVS. Datalinks do not write to NVS and should
be used for frequently changed parameters.