Omron C200HE ユーザーズマニュアル

3. Communications are completed just after the slave executes communica-

tions servicing.

I/O refresh

Overseeing, communica-
tions, etc.

Input ON delay

Master

Input
point

Input
bit

CPU Unit
processing

Cycle time

Instruction
execution

Instruction
execution

Instruction
execution

Instruction
execution

Instruction
execution

Slave

Master to
Slave

Slave to
Master

Master to
Slave

CPU Unit
processing

Output point

Output ON
delay

Instruction
execution

One-to-one link
communications

The maximum I/O response time is as follows:

Input ON delay:

8 ms

Master cycle time:

10 ms 

×

 2

Transmission time:

39 ms 

×

 3

Slave cycle time:

15 ms 

×

 2

+

Output ON delay:

10 ms

Maximum I/O response time:

185 ms

The response time from the time an interrupt input is received until the interrupt
subroutine execution has been completed is described next.

External interrupt input signal

Internal interrupt signal

Interrupt subroutine execution

t1

t2

t1 = ON delay of Interrupt Input Unit
t2 = Software interrupt response time

Total interrupt response time = t1 + t2
The ON delay of Interrupt Input Unit is 0.2 ms or less.
The software interrupt response time depends on the interrupt response param-
eter setting in DM 6620 of the PC Setup. If the DM 6620 is set for the C200H-
compatible mode (0000), the software interrupt response time is less than
10 ms. If the DM 6620 is set for the C200HX/HG/HE mode (1xxx), the software
interrupt response time is less than 1 ms. The total interrupt response time is
thus as shown in the following table.

C200H-compatible mode
(Normal response)

0.2 ms + (Total of following: Special I/O
processing time, Remote I/O processing time,
Host Link servicing time, instruction execution)

C200HS mode
(High-speed response)

1.2 ms or less