C500LK009V1 Omron, C500LK009V1 Datasheet - Page 83

• Manufacturer Part Number: C500LK009V1
• Description: PC LINK UNIT
• Manufacturer: Omron

Specifications of C500LK009V1

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Data Link Characteristics
Case 2
Input
X
Input ON delay
(1)
1, 2, 3...
Input device
Program
Note
PC at node #7
The following diagram illustrates the data flow that will produce the maximum
data link I/O response time when the cycle time of the PC at node #1 y the com-
munications cycle time and the cycle time of the PC at node #7 t the commu-
nications cycle time.
There are three points shown in the diagram above where processing is
delayed, increasing the data link I/O response time.
The equation for maximum data link I/O response time is as follows:
Response time =
input ON delay (1.5 ms) + cycle time of PC at node #1 (20 ms) × 2
+ communications cycle time (19 ms) × 3 + PC cycle time at node #7 (15 ms) × 2*
+ output ON delay (15 ms)
= 143.5 ms*
1. The input arrives in the PC just after I/O refreshing, causing a delay of up to
2. Data exchange occurs just after the PC at node #1 passes the token that
3. The data transferred in data link processing arrives at the PC at node #7
1. *If more than 1,642 words are being transferred, 3 cycles of the PC at node
2. Noise may increase I/O delays.
X
Communications
cycle time
one cycle before the input is read into the PC.
makes it the polling unit, causing a delay of up to one communications cycle
time before the data is transferred in data link processing.
after data exchange, so the data will not be read into the PC until the next
data exchange, causing a delay of up to one cycle.
Up to 1,642 words can be transferred in a single data exchange, so a delay
of another cycle will occur if more than 1,642 words are being transferred.
#7 are required and the total response time becomes 158.5 ms.
1 cycle
(2)
Data link I/O response time
SYSMAC LINK Unit
transmission processing
PC at node #1
1 cycle
Data link transmission
X
Output device
SYSMAC LINK Unit
transmission processing
(3)
Program
Output ON
delay
Output
I/O refresh
Data exchange
Section 5-10
69