Rockwell Automation 1794-ASB/E Remote I/O Adapter Module User Manual - Manual (Page 52)

3–18 Communicating with FLEX I/O Modules
Publication 1794ĆUM009D-EN-P - April 2004
If a rack size offset by the selected quarter results in more than a full
rack, the adapter will declare a rack fault and error as indicated.
In 32 point mode, the starting quarter should always be 0 (switches
S1–8 and S1–7 on).
ATTENTION
!
Do not use the auto-config feature of 6200
software when using a PLC-3 processor with
1775-S4A or 1775-S4B scanner modules. If you
do an auto-config for a scanner channel
containing 1 or more 1794-ASB adapters with that
configuration, the adapters may not show up in
the scan list for that scanner channel. Manually
insert these adapters into the scan list for the
scanner.
Most reset commands are issued by the processor when it is placed
in the PROG mode. However, the processor automatically issues a
special command to any rack declared faulted regardless of the
processor mode.
When this special command is received by the faulted remote I/O
adapter, and processor restart lockout (PRL) has not been selected,
the adapter will:
•
continue to read output image data from the link, and queue block
transfers if MCBs are detected
•
reset all bits in the output words of digital modules
•
reset all bits in the write words of analog modules up to but not
including the write words of the safe state values
•
assigns safe state values to outputs of analog modules
•
issue a reply command
If processor restart lockout (PRL) has been selected, the adapter does
not update data, does not issue a reply command, and does not clear
the fault.
In this chapter, you learned how to address your I/O, how to
determine rack size, and how the modules are mapped
Operating Modes
Chapter Summary