Rockwell Automation 1404-M4_M5_M6_M8 Powermonitor 3000 User Manual, Firmware rev. 3.0 or LATER - Manual (Page 84)

84 Publication 1404-UM001F-EN-P - November 2009
Chapter 4 Communication
A valid write to a data table must meet the following general criteria:
•
The length of the source data array must equal the data table
length. Note that the same data table may have a different length
in various power monitor models.
•
The entire data table must be written in one pass.
•
The first element in the source data array must generally contain
the correct password (or a value of -1 for read-back data
selection).
•
The source and destination data type must match, for example,
floating point or integer.
•
Each element of the source data array must be within the legal
range listed in the data table specification.
•
Reserved elements must be the correct value, usually 0.
•
For DeviceNet optional communication only, each consecutive
write must be unique.
You may read the Write Error Status table after writing to a data table
to verify that the write was valid and accepted by the power monitor.
If there was an error in the last write, the Write Error Status indicates
the CSP file or assembly instance (DeviceNet network only) number
and the offending element number.
You may write data to the power monitor for basic and advanced
device configuration, to set the time and date, to set up setpoints,
logs, oscillography and transient analysis, and to select records to be
read back from indexed data reads such as harmonics, oscillography
and logs.