Instructions

DF1 Protocol Mode 51
Doc: HMSI-27-306, Rev. 3.11Anybus Communicator PROFIBUS User Manual
9.6 Integrity Check
This service checks that a node is up and running correctly. A telegram is sent to the node. The node
mirrors and returns the telegram. No configuration is needed, apart from the general parameters, com-
mon to all services.
9.7 Read Diagnostics
This service reads diagnostic information from the module.
Command parameters
The command parameter Size decides the amount of data that can be read. The size is given in bytes
which means that it always has to be an even number as only whole elements can be read from the slave.
One bit/integer element is 2 bytes and one float element is 4 bytes. The range of the size differs, de-
pending on node type:
Data options:
PLC-5 SLC500 MicroLogix
Size range (in bytes) 1–26 1–28 1–26
Parameter Description Valid settings
Byte swap Determines if the data shall be swapped No byte swap
Swap words
Swap double words
Data length The number of bytes, read from the DF1 network, to write to the area determined
by the Offset parameter
Size
Offset The offset in the internal memory buffer in the module, where the data shall be
read.