Filter
Top Products
385
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
6-4-6 Interrupt Response Times
The response time from the time an interrupt input is received until the interrupt
subroutine execution has been completed is described next.
Input Interrupts
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.
Interrupt response setting Total interrupt response time
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
I/O Response Time Section 6-4