User Manual Instruction Manual

Application Notes
13-69
(RAM) and lost when the drive loses power.
13.23.2 32-Bit Parameters using 16-Bit Datalinks
To read (and/or write) a 32-bit parameter using 16-bit Datalinks, typically both
Datalinks (A,B,C,D) are set to the 32-bit parameter. For example, to read Elapsed
MWh (09), both Datalink A1 and A2 are set to “9.” Datalink A1 will contain the least
significant word (LSW) and Datalink A2 the most significant word (MSW). In this
example, the parameter 9 value of 5.8MWh is read as a “58” in Datalink A1
Regardless of the Datalink combination, x1 will always contain the LSW and x2 will
always contain the MSW.
In the following examples Power Up Marker (242) contains a value of 88.4541 hours.
Even if non-consecutive Datalinks are used (in the next example, Datalinks A1 and B2
would not be used), data is still returned the same way.
32-bit data is stored as follows
13.23.3 Example
Parameter 242 - [Power Up Marker] = 88.4541 hours
MSW = 13
decimal
= 1101
binary
= 2
16
+ 2
18
+ 2
19
= 851968
LSW = 32573
851968 + 32573 = 884541
Datalink
Most/Least
Significant Word Parameter Data (decimal)
A1 LSW 9 58
A2 MSW 9 0
Datalink
Most/Least
Significant Word Parameter Data (decimal)
A1 LSW 242 32573
A2 -Not Used- 0 0
Datalink
Most/Least
Significant Word Parameter Data (decimal)
A1 -Not Used- 0 0
A2 MSW 242 13
Datalink
Most/Least
Significant Word Parameter Data (decimal)
A1 MSW 242 13
B1 LSW 242 32573
MSW 2
31
through 2
16
LSW
2
15
through 2
0