Omron C200HW-PRM21 Operation Manuals page 83

Control and status area
IR n+2.11 Control command not processed.
This bit is related to control commands sent via the control words
IR n and IR n+1, not the one sent via IOWR instruction.
0: The output mailbox was able to receive and process the
previously issued control command message.
1: The issued control command could not be processed because
the output mailbox was full (see section 5-2) or the RUN-bit
was not set or the bus communication was inhibited.
This bit should be checked in the PLC cycle following the
activation of a control command.
IR n+2.12 Output mailbox full
0: The output mailbox is able to receive (and process) a
message. This message can be a control command issued via
IR n or any PROFIBUS command by using the IOWR
instruction.
1: The output mailbox is full and cannot receive new messages
(see section 5-2).
IR n+2.13 Reply in input mailbox
0: The input mailbox does not contain a response message to a
command message issued with IOWR.
1: The input mailbox contains a response message to a
command message issued with IOWR.
The PLC program should read this message from the input
mailbox with IORD, or clear the message by setting IR n.02. If
multiple command messages are issued without reading the
responses, the input mailbox will fill up, making it impossible to
send out further command messages (see section 5-2).
IR n+4 contains the source information for the IORD
instruction.
IR n+2.14 Network state (PROFIBUS-DP status bits).
IR n+2.15
IR n+2.15
0
0
1
1
Note The network state will be Offline when a P-DP H/W failure is detected
(IR n+2.06 is ON) or when a database download is in progress.
IR n+2.14 Network state
0 Offline
Communication with all DP participants is
stopped.
1 Stop
Only communication
(class 2) is possible.
0 Clear
The master tries to set parameters, check
configuration and perform data exchange
with its associated DP-slaves; the slaves'
inputs are transferred to the input buffer,
their outputs are cleared.
1 Operate
The master exchanges data with the
assigned DP-slaves.
Section 5-3
with DP-Master
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