Rockwell Automation 1203 Serial Communications Module Series B User Manual
Page 51
5–3
Block Transfer Emulation Instructions
1203–5.5 September 1995
Message Operation
Scattered Parameter Value Read reads a pre–defined group of
parameter values, in any order, from the device. You define the
number of parameters to read in word 3 of the request. The
parameters to be read and their order is defined starting with word 4.
An unused word is left between each parameter request, so the drive
can respond with the parameter value, as shown.
If an error has occurred in reading any of the parameters:
•
Word 2 of the drive response returns a value of –32765.
•
Bit 15 of the drive response word for the number of that
parameter is set.
•
The drive response word for the value of that parameter returns a
status word instead of returning the parameter value.
Example
In this example, eight parameters were read from a 1336 PLUS
drive, as defined in word 3 of the request. The parameter numbers
requested were 5, 7, 8, 20, 18, 17, 19, and 36. The drive response
returned the values of these parameters in the data file. These values
are in drive units.
Data File Format
19
3
8*
0
18*
0*
17*
* Example only – These values vary depending on parameters and products.
19
3
4096*
4096*
18*
8*
5*
5*
17*
0
6*
51*
19*
7*
19*
0
1000*
60*
36*
8*
36*
0
1000*
6144*
20*
0
7*
0
8*
0
20*
0
N10:10
N10:20
1
2
3
4
5
6
7
8
9
N10:90
N10:100
PLC request
Drive response