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Participation Flags and Communications Error Flags (Communications Mode 0 to 3 Only)
These flags indicate nodes participating in the network and nodes where errors have occurred after
participation has started.
Flag name
Participation Flag
Communications
Error Flag
Refer to A-2 Status Area Allocations According to Communications Modes for Slave Unit allocations.
Note: With a Contact I/O Unit, only the Input Flags for the input node are allocated.
The portion of memory that can be used for Slave Units is allocated in I/O memory in the CPU Unit. (For
example, in communications mode 3, there are eight nodes each for inputs and outputs, so words +0 and +1
are used.)
CompoNet Gateway Unit for CC-Link Operation Manual
ON: The applicable Slave Unit is participating or has participated in the network.
OFF: Power has been interrupted or a restart has been executed.
Note: A Participation Flag turns ON once the corresponding Slave Unit starts partici-
pating in the network after the system is started (i.e., when the power is turned
ON). (It remains ON even if the Slave Unit stops participating due to a communi-
cations error.)
ON: A communications error occurred at the applicable Slave Unit when it was
participating in the network.
OFF: A communications error has not occurred at the applicable Slave Unit while it
was participating in the network.
Note: A Communications Error Flag turns ON if the applicable Slave Unit cannot com-
municate with the Gateway Unit for any reason after the Slave Unit has joined
the network (i.e., if the Participation Flag is ON). It turns OFF when the error is
removed.
Remote I/O Communications
Description
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