Operations Significantly Increasing Cycle Time; Potential Problems With Event Processing - Omron SYSMAC CVM1 Series Operation Manual

Calculating Cycle Time

6-2-6 Potential Problems with Event Processing

Multiple Writing Events
Multiple Instruction
Execution Events
6-3 Calculating Cycle Time
Online edit operation
Instruction block inserted or deleted at the beginning of 1
62K-word program.
Instruction block including JME(005) deleted at the beginning
of a 62K-word program.
While PC operation is stopped, output status is retained and inputs are not
accepted and communications with SYSMAC NET, SYSMAC LINK, SYS-
MAC BUS/2, Host Link, and Programming Devices are stopped.
It is possible for two or more events (unscheduled requests for data processing)
from Programming Devices, the host interface, or CPU Bus Units to occur at the
same time.
When two or more writing events (writing the program, writing parameters, reg-
istering the I/O table, changing the mode) occur simultaneously, they are pro-
cessed in the order in which they were received. The later arriving events will not
be executed until the earlier events have been completed.
The following SSS operations are writing events:
Data modification, set, reset, online edit, DM edit, mode change, transfer
block (SSS to PC), save block (SSS to PC), I/O table transfer, I/O table
register, PC Setup, PC Setup information transfer, data trace execution,
program trace execution, setup for BASIC Units and Personal Computer
Units, software switch settings for BASIC Units and Personal Computer
Units, data link table transfer, routing table transfer, clearing errors, clearing
the error log, setting the clock, setting program memory protect, clearing
program memory protect, debug transfer, reading cycle time
The following host interface operations are writing events:
Data area block write, data area transfer, parameter area write, parameter
area block write, start program area protect, clear protect area, program
area write, program area clear, start execution, stop execution, write clock
information, clear message, allow access, force allow access, open access,
clearing errors, clearing the error log, variable area to file transfer,
parameter area to file transfer, program area to file transfer, force set/reset,
force set/reset for all bits
Like writing events, when two or more instruction execution events (reading/
writing the program, etc.) occur simultaneously, they are processed in the order
in which they were received. The later arriving events will not be executed until
the earlier events have been completed.
The following SSS operations are instruction execution events:
Monitoring, data modification, set, reset, online edit, DM edit, search,
transfer block (SSS to PC), save block (SSS to PC), I/O table change, PC
Setup, PC Setup information transfer, data trace execution, program trace
execution, setting program memory protect, clearing program memory
protect
The following host interface operations are writing events:
Data area block write, multiple data area read, data area transfer, parameter
area write, parameter area block write, start program area protect, clear
protect area, program area read, program area write, program area clear,
cycle time read, program area to file transfer, force set/reset, force set/reset
for all bits
The PC configuration, the program, and program execution conditions must
be taken into consideration when calculating the cycle time. This means tak-
Section 6-3
Stopped time
Approx. 0.5 s
Approx. 0.2 s
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