Operation Of Timer Instructions - Omron CX-PROGRAMMER 5.0-FUNCTION BLOCK OPERATION Operation Manual

CPU Unit Function Block Specifications
Item
Function Maxi- 128
blocks mum
number of
definitions
Maxi- 256
mum
number of
instances
Flash Function 256
memory block pro-
gram
memory
(Kbytes)
Com- 64
ment files
(Kbytes)
Program 64
index files
(Kbytes)
Variable 64
tables
(Kbytes)
2-7-2

Operation of Timer Instructions

Selecting the Option
(Default)
Not Selecting the
Option
Units with internal I/O functions
There is an option called Apply the same spec as TO-2047 to T2048-4095 in
the PLC properties of CPU Units. This setting affects the operation of timers
as described in this section.
If this option is selected, all timers will operate the same regardless of timer
number, as shown in the following table.
Timer Operation for Timer Numbers T0000 to T4095
Refresh
When instruction is
executed
When execution of all
tasks is completed
Every 80 ms
If this option is not selected, the refreshing of timer instructions with timer
numbers T0000 to T2047 will be different from those with timer numbers
T2048 to T4095, as given below. This behavior is the same for CPU Units that
do not support function blocks. (Refer to the descriptions of individual instruc-
tion in the CS/CJ Series Instruction Reference for details.)
Specification
Units without internal I/O functions
Description
The PV is refreshed each time the instruction is executed.
If the PV is 0, the Completion Flag is turned ON. If it is not 0,
the Completion Flag is turned OFF.
All PV are refreshed once each cycle.
If the cycle time exceeds 80 ms, all PV are refreshed once
every 80 ms.
Section 2-7
107