Rockwell Automation 150 USE MN/SMC DIALOG + CONTROLLER - Manual (Page 138)

Serial Communications 8-29
SMC Dialog Plus Controller Status Addresses ②
② Refer To Table 8.B
Explicit Messaging:
The 1747-SDN scanner module uses the M0 and M1 file areas for
data transfer. Words 224 through 256 must be used to execute the
Explicit Message Request and Response functions. The minimum
data size for an Explicit Message Request is 6 words and the
maximum is 32 words. Following is the data format to follow for a
scattered parameter value read (Get Attribute Multiple) as used in this
example:
Explicit Message Request (Get Attribute Multiple)
Bit Description Address
Enabled I:1.7/00
Running I:1.7/01
Starting I:1.7/04
Stopping I:1.7/05
Fault I:1.7/07
At Speed I:1.7/08
15 0
TXID COMMAND word 0
PORT SIZE
SERVICE MAC ID
CLASS
INSTANCE
ATTRIBUTE
PARAMETER
DATA PLACE HOLDER
“ word 31