Integrity Check; Read Diagnostics - Anybus Communicator Modbus plus 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:
Size range (in bytes)
Data options:
Parameter Description
Byte swap Determines if the data shall be swapped
Data length The number of bytes, read from the DF1 network, to write to the area determined
by the Offset parameter
Offset The offset in the internal memory buffer in the module, where the data shall be
read. See "Memory Map" on page 15
Anybus Communicator for Modbus Plus
Doc.Rev. 3.01
PLC-5 SLC500
1-26 1-28
MicroLogix
1-26
DF1 Protocol Mode 56
Valid settings
No byte swap
Swap words
Swap double words
≤ Size
Doc.Id. SCM-1200-093