Cpu Processing Modes - Omron CS1G/H-CPUxx-EV1 Programming Manual

CPU Processing Modes

6-8 CPU Processing Modes
6-8-1 CPU Processing Modes
This function can be used when only system FAL errors need to be stored in
the error log, e.g., when there are many user-defined errors generated by the
program using FAL(006) and these fill up the error log too quickly.
PLC Setup
Programming
Console
address
Word Bit
129 15 User FAL
Storage
Setting
Note The following items will be stored in the error log even if the above setting is
used to prevent user-defined FAL errors from being recorded.
• User-defined fatal errors (FALS(007))
• Non-fatal system errors
• Fatal system errors
• User-simulated nonfatal system errors (FAL(006))
• User-simulated fatal system errors (FALS(007))
Normally, peripheral servicing (see note) is performed once at the end of each
cycle (following I/O refresh) either for 4% of the cycle or a user-set time for
each service. This makes it impossible to service peripheral devices at a rate
faster than the cycle time, and the cycle time is increased by the time required
for peripheral servicing.
With CS1D CPU Units for Single-CPU Systems or with CS1-H or CJ1-H CPU
Units, however, Parallel Processing Modes are supported that enable pro-
cessing program execution in parallel with peripheral servicing. These modes
enable faster peripheral servicing and shorter cycle times, especially when
there is extensive peripheral servicing required. (CS1D CPU Units for Duplex-
CPU Systems and CJ1M CPU Units do not support the Parallel Processing
Modes.)
Note Peripheral servicing includes non-schedule services required by external
devices, such as event servicing (e.g., communications for FINS commands)
for Special I/O Units, CPU Bus Units, and Inner Boards (CS Series only), as
well as communications port servicing for the peripheral and RS-232C ports
(but not including data links and other special I/O refreshing for CPU Bus
Units).
Name Setting
0: Record user-defined FAL
errors in error log.
1: Don't record user-defined
FAL errors in error log.
Section 6-8
Default CPU Unit
refresh
timing
0: Whenever
Record FAL(006) is
executed
(every
cycle)
331