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Cycle Time/High-speed Processing Section 6-1
6-1-5 Interrupt Functions
Interrupt tasks can be executed for the following conditions. Refer to 4-3 Inter-
rupt Tasks for more details.
Note The CS1D CPU Units for Duplex-CPU Systems do not support interrupts.
With the CS1D CPU Units, interrupt tasks can be used only as extra cyclic
tasks, i.e., no other type of interrupt task can be used.
I/O Interrupts (Interrupt tasks 100 to 131)
An I/O interrupt task is executed when the corresponding input (on the rising
edge of the signal or, for CS/CJ-series Interrupt Input Units, on either the ris-
ing or falling edge) is received from an Interrupt Input Unit.
Scheduled Interrupts (Interrupt tasks 2 and 3)
A scheduled interrupt task is executed at regular intervals.
Power OFF Interrupt (Interrupt task 1)
This task is executed when the power is interrupted.
External Interrupts (Interrupt tasks 0 to 255)
An external interrupt task is executed when an interrupt is received from a
Special I/O Unit, CPU Bus Unit, or Inner Board.
Note The built-in interrupt inputs and high-speed counter inputs on a CJ1M CPU
Unit can be used to activate interrupt tasks. Refer to the CJ Series Built-in I/O
Operation Manual for details.
6-1-6 I/O Refreshing
There are two ways to refresh real I/O, cyclic refreshing and immediate
refreshing, which have different timing. The following table shows when these
methods can be used.
CS1W-IDP01: 0.1 ms
CJ1W-IDP01: 0.05 ms
C200H-ID501/ID215/MD501/MD115/MD215: 4 ms
High-speed Input Unit or
High-density Input Unit
Relevant Unit Basic I/O Units Special I/O Units CPU Bus Units
I/O refreshing method
Cyclic refreshing Can be used. Can be used. Can be used.
Immediate
refreshing
Specified as an instruction
variation (!)
Can be used. Cannot be used. Cannot be used.
IORF(097) instruction Can be used. Can be used. Cannot be used.
FIORF(225) instruction
(CJ1-H-R CPU Units only)
Cannot be used. Can be used. Cannot be used.
DLNK(226) instruction Cannot be used. Cannot be used. Can be used.
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