Rockwell Automation 1203-SM1 SLC to SCANport Communication Module - Manual (Page 91)

SCANport Messaging B–25
Publication 1203–5.9 –– October 1996
Scattered Write
The Scattered Write message lets you write the values of multiple
parameters, not necessarily starting from parameter 1. The following
is an example of this request:
Service=Set Attribute Scattered
Internal A–B Vendor Specific Class
Instance
Attribute
Data Length=12 Bytes
M0:e.000
M0:e.001
M0:e.002
M0:e.003
M0:e.004
0034
0093
0000
0000
000c
Value
Scattered Write
Service=Set Attribute Scattered
Internal A–B Vendor Specific Class
Instance
Attribute
Data Length=12 Bytes
M1:e.100
M1:e.101
M1:e.102
M1:e.103
M1:e.104
0034
0093
0000
0000
000c
Value
Response to Scattered Write
Parameter 5 M0:e.005 0005
Value
Parameter 6
Value
Parameter 7
M0:e.006
M0:e.007
M0:e.008
M0:e.009
0001
0006
0002
0007
Value M0:e.010 0258
Parameter 5*
Status (see error codes)
Parameter 6*
M1:e.105
M1:e.106
M1:e.107
0005
0000
0006
Status (see error codes)
Parameter 7*
Status (see error codes)
M1:e.108
M1:e.109
M1:e.110
0000
0007
0000
Note: The Scattered Write can continue
on in this pattern for up to 47 parameters.
Note: The Scattered Write can continue on
in this pattern for up to 47 parameters.
* If an error has occurred while writing to this
parameter, the MSB of the parameter number
will be set to 1.
Figure B.18 shows a Scattered Write request. This example writes
three parameters.
N10:4 contains the length of the data in bytes (three parameters
require 12 bytes). A pair of words are required for each parameter
being read (starting at N10:5). The first word of each pair is the
parameter number. The second word is the value to be written.