Omron SYSMAC CS Series Operation Manual page 145

Allocated CIO Area Words
Word n+17 to n+24 [n = CIO 1,500 + (25 x unit number)]
Bit Name
– Slave New Diag-
nostics flags
124
Status Controlled
by
ON Unit If the bit corresponding to a slave device address is ON, it indicates that
this slave device
• is allocated to the PROFIBUS Master Unit, and
• has sent new diagnostics message to the PROFIBUS Master Unit.
In this case, the PROFIBUS Master Unit must be in CLEAR mode or
OPERATE mode.
OFF Unit If the bit corresponding to a slave device address is OFF, it indicates
that
• the slave device has not sent a new diagnostics message to the
• the slave device has not been allocated to this PROFIBUS Master
• the PROFIBUS Master Unit is not in CLEAR or OPERATE mode
Note In case an allocated slave device is not responding, and there-
Unit operation
PROFIBUS Master Unit, since the last time it was read or cleared, or
Unit, or
fore not sending a diagnostics message, the PROFIBUS Master
Unit itself will provide a diagnostics message to the PLC CPU
containing the mandatory first 6 bytes. This diagnostics mes-
sage will then indicate that the slave is not responding.
Section 4-2