ProSoft Technology MVI69-DFCM - Manual (Page 73)

Reference MVI69-DFCM ♦ CompactLogix or MicroLogix Platform
DF1 Interface Module
ProSoft Technology, Inc. Page 73 of 117
November 3, 2008
Read Block: Read Slave Status
Offset Description Length
0 3002 to 3006 or 3102 to 3106 1
1 Write Block ID 1
2 to 61 Slave Poll Status Data 60
62 to n Spare (if present)
The sample ladder logic shows how to override the value in the slave status table
to disable slaves (state value of 3) by sending a special block of data from the
processor to the slave. Port 1 slaves are disabled using block 3000, and Port 2
slaves are disabled using block 3100. Each block contains the slave node
addresses to disable. The structure of the block is displayed below:
Write Block: Disable Slaves
Offset Description Length
0 3000 or 3100 1
1 Number of slaves in block 1
2 to 61 Slave indexes 60
62 to (n+1) Spare
n=120, or 240 (if configured)
The module will respond with a block with the same identification code received
and indicate the number of slaves acted on with the block. The format of this
response block is displayed below:
Read Block: Disable Slaves
Offset Description Length
0 3000 or 3100 1
1 Write Block ID 1
2 Number of slaves processed 1
3 to (n+1) Spare
n=60, 120, or 240 (if configured)
The sample ladder logic explains how to override the value in the slave status
table to enable the slave (state value of 1) by sending a special block. Port 1
slaves are enabled using block 3001, and Port 2 slaves are enabled using block
3101. Each block contains the slave node addresses to enable. The format of the
block is displayed below:
Write Block: Enable Slaves
Offset Description Length
0 3001 or 3101 1
1 Number of slaves in block 1
2 Slave indexes 1
3 to n Spare
n=60, 120, or 240 depending on what is entered in the Block Transfer Size parameter (refer to the
configuration file).