Omron CJ - 09-2009 Operation Manual page 59

CJ-series Features
Other Functions
Data Trace Function
Fixed Cycle Time Function
I/O Refreshing Methods
PLC Setup Functions
Binary Refreshing of Timer/Counter Instruction PVs
Windows-based Support Software
The content of the specified word or bit in I/O memory can be stored in trace
memory by one of the following methods: scheduled sampling, cyclic sam-
pling, or sampling at execution of TRSM(045).
Specified address
in I/O memory
A fixed (minimum) cycle time can be set to minimize variations in I/O response
times.
I/O refreshing can be performed cyclically and immediately by programming
the immediate-refreshing variation of the instruction.
PLC operation can be customized with PLC Setup settings, such as the maxi-
mum cycle time setting (watch cycle time) and the instruction error operation
setting, which determines whether instruction processing errors and access
errors are treated as non-fatal or fatal errors.
Present values of timer/counter instructions can now be refreshed in binary, in
addition to the existing BCD capability. (Binary refreshing, however, can be
specified with only CX-Programmer Ver. 3.0 and higher.) This allows the timer/
counter setting time to be expanded to a range of 0 to 65535 (from the exist-
ing 0 to 9,999). Also, results calculated by other instructions can be used as is
for timer/counter set values.
The single-port multiple-access (SPMA) function can be used to program and
monitor other CPU Bus Units on the same bus (CPU Rack or Expansion
Trace memory
The PLC's initial settings can be
customized with the PLC Setup.
Section 1-2
11