MVI69-PDPMV1
♦
CompactLogix or MicroLogix Platform
Reference
PROFIBUS DPV1 Master
User Manual
ProSoft Technology, Inc.
Page 165 of 225
July 8, 2011
6.3.3 Block Numbers for Transfer
The number of block IDs required for data transfer varies, depending on the
Block Transfer Size
chosen, 240 words, 120 words, or 60 words. The following
charts show the block IDs used for the three different size options.
If Block Transfer Size = 240
Block #s
Type
Description
-1 or 0
Status
Block containing status data
1 to 4
Input Data
Input data from PROFIBUS network with each block containing
up to 200 words of data
1 to 4
Output Data
Output data for PROFIBUS network with each block containing
up to 200 words of data
100 to 109
Mailbox
These block numbers send or receive mailbox messages
200 to 209
Alarms
These block numbers send alarm messages from the
PROFIBUS network to the processor.
For
Block Transfer Size
= 240, four input/output blocks are needed to transfer the
maximum possible amount of PROFIBUS cyclic input and cyclic output data.
Block IDs 1, 2, 3, and 4 are used to identify cyclic data.
Although there are ten (10) mailbox messaging block IDs allocated for this
option, only one is needed for actual mailbox data transfer. The additional block
IDs can be used in customer application logic to help organize and coordinate
multiple mailbox message requirements. The user can assign any of the
available block IDs to an outgoing mailbox request and the subsequent response
input block will be returned with a matching block ID.
If Block Transfer Size = 120
Block #s
Type
Description
-1 or 0
Status
Block containing status data
1 to 8
Input Data
Input data from PROFIBUS network with each block containing
up to 100 words of data
1 to 8
Output Data
Output data for PROFIBUS network with each block containing
up to 100 words of data
100 to 101
Mailbox
These block numbers send or receive mailbox messages
200 to 201
Alarms
These block numbers send alarm messages from the
PROFIBUS network to the processor.
For
Block Transfer Size
= 120, eight input/output blocks are needed to transfer
the maximum possible amount of PROFIBUS cyclic input and cyclic output data.
Block IDs 1 through 8 are used to identify cyclic data.
