User Manual

6 Communication
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:
Assume a value of 46.2 was written to %MD56.0 via PROFIBUS. The Event Log may
look like this:
Step 38 shows that the File is 56 (38 in hexadecimal), bit 31 is set to 1 for a write.
The Explicit Write register contains the write value 46.2, but it is very difficult to
decipher a float value from its hexadecimal representation.
Step 39 shows that the Read/Writer Request bit changed, which requested the
write.
6.9.5.4. PROFIBUS Mode: Enhanced
The Enhanced mode is one of the Basic/Enhanced PROFIBUS Modes available only on the
RMC75P. Most users will prefer the I/O Modes instead.
Features
This mode has the following features:
• Eight (8) user-selectable cyclic read registers are continuously read for instant access
by the PLC or PC.
See Response Block and Setting Up the Indirect Data Map below.
• One (1) register anywhere in the RMC70 can be explicitly written or read.
See Read Any Single RMC70 Register and Write to Any Single RMC70 Register
below.
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