C500LK009V1 Omron, C500LK009V1 Datasheet - Page 82

• 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

Input
Data Link Characteristics
Maximum Response Time
Case 1
68
X
Input ON delay
(1)
Input device
Program
1, 2, 3...
Note
X
Communications
cycle time
The maximum data link I/O response time is calculated for four cases.
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 nodes #1 and 7 are
greater than the communications cycle time.
There are four 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 (50 ms) × 3*
+ output ON delay (15 ms) = 263.5 ms*
1 cycle
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. At node #7, data from the previous data exchange is still being transferred,
4. The data transferred in data link processing arrives at the PC at node #7
1. *If more than 1,642 words are being transferred, 4 cycles of the PC at node
2. Noise may increase I/O delays.
(2)
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.
causing a delay of up to one cycle before the input is read into the PC.
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 313.5 ms.
PC at node #7
Data link I/O response time
SYSMAC LINK Unit
transmission processing
PC at node #1
X
Previous communica-
tions cycle data
(3)
X
1 cycle
Data link transmission
X
Output device
SYSMAC LINK Unit
transmission processing
(4)
Program
Output ON delay
Section 5-10
I/O refresh
Data exchange
Output