CV500BC051 Omron, CV500BC051 Datasheet - Page 287

• Manufacturer Part Number: CV500BC051
• Description: Programmable Logic Controller
• Manufacturer: Omron

Specifications of CV500BC051

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

CVM1 and CV-series PLCs Under Asynchronous Operation
Maximum Response Time
262
Data Link I/O Response Time
Input
Input ON delay
(1)
1,2,3...
Program
PLC at node #7
Data link I/O response time
There are five points shown in the diagram above where processing is
delayed, increasing the data link I/O response time.
1. The input arrives in the PLC just after I/O refreshing, causing a delay of up
2. Data exchange occurs just after the PLC 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 PLC at node #7
5. The data is received after the PLC at node #7 has executed the instruction,
Communications
cycle time
Input device
to one cycle before the input is read into the PLC.
makes it the polling node, causing a delay of up to one communications cy-
cle 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 PLC.
after data exchange, so the data will not be read into the PLC until the next
data exchange, causing a delay of up to one peripheral servicing interval.
Up to 3,700 words can be transferred in a single data exchange, so a delay
of another peripheral servicing interval will occur if more than 3,700 words
are being transferred.
causing a delay of up to one cycle time.
(2)
1 cycle
Controller Link Unit transmission processing
Previous communica-
tions cycle data
PLC at node #1
Peripheral servicing interval
(3)
1 cycle
Output device
(4)
Data link transmission
Controller Link Unit transmission processing
Program
Output ON
delay
Peripheral servicing interval
I/O refresh
Output
Section 8-3