Delta RMC151 - Manual (Page 519)

6 Communication
• Data Changes
(the Command Channel Logging and Data Channel Logging boxes must be set to
All in the Event Log filter for PROFIBUS)
Each time the data in the Command Block changes, the data will be logged with an
entry labeled changed. The entry will also specify which data changed, as described
below.
• A Request is Made
(the Command Channel Logging and Data Channel Logging boxes must be set to
All or Requests in the Event Log filter for PROFIBUS)
Each time a Command Request bit or Read/Write Request bit is toggled, the entry will
be labeled request made. This indicates a command was requested to be issued, or a
read or write was made.
Tip:
In some cases, a request can be made, but nothing happens. This is probably
caused by one of the following:
- A command was requested, but no Selected Axis bit was set.
- A read or write of multiple registers was requested, but the Count was set to 0.
The Event Log labels the logged entries in the following manner:
• Command Area
These 6 registers are the data used to issue commands to the RMC70.
• Data Channel 0
These 2 registers contain the data for reading or writing a single RMC70 register. Data
Channel 1 is not used with Basic Mode.
Debugging the Command Area Data
The Event Log displays the Command Area data in the following order:
Cmd Register, Cmd Parameter 1, Cmd Parameter 2, Cmd Parameter 3, Cmd Parameter 4,
Cmd Parameter 5
Example:
Assume a Move Absolute command has been issued to the RMC70 via PROFIBUS.
The Event Log may look like this:
Steps 28-31 show how the command parameters are changing. The command word
shows the command that will be issued, (hexadecimal 14 is 20 in decimal), and the
command select bit ( the 1 in the middle of the word).
In step 33, bit 31 of the Command Register changed, which then issued the move
command.
Debugging Data Channel 0
The Event Log displays the Data Channel 0 data in the following order:
Read/Write Register (register 6), Explicit Write Value (register 7)
Example:
deltamotion.com 499