CV500BC051 Omron, CV500BC051 Datasheet - Page 282

• 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

Data Link I/O Response Time
Calculation Example
8-3
8-3-1
Data Link I/O Response Time
Data Exchange Timing
The number of bytes in each message differs according to the instruction
being issued.
Communications conditions are as follows:
In this example, B to E in the equation have the following values.
The communications cycle time is thus as follows:
When accurate communications timing is required, you need to understand
data exchange timing and the time required for data transmission and recep-
tion via data links. Use the information described in this section as reference
information for system construction.
This section describes data exchange timing for data links between the Con-
troller Link Unit and the PLC’s CPU Unit. Data exchange is executed as inter-
rupt processing during CPU Bus Unit or Programming Device/Host Link
servicing performed by the CPU Unit. This interrupt processing is executed
each time data exchange between the local node and each node connected
via a data link is completed.
Data exchange timing differs depending on the CPU Unit model and the CPU
Unit the Execute Process (asynchronous or synchronous) specified in PLC
Setup, as described below.
SEND
RECV
CMND
Instruction
Transmission medium:
Baud rate:
Network parameters:
Max node address:
Polled nodes per comm cycle:
Event-frames per comm cycle:
Network configuration:
Nodes that send messages:
Bytes in all messages sent:
B:
C:
D:
E:
600 × 4 + 110 × 8 + 320 × 2 + 4 × 4,024 + 2,290 = 22,306 ( µ s)
≅ 22 (ms)
4
8
2
4,024
+ 18
18
data + 10
Number of words to be sent × 2
Number of bytes in command
When sent
Twisted-pair cables
2 Mbps
Defaults
32
4
35
8 nodes
2 nodes
2,012 × 2 bytes
14
Number of words to be
received × 2 + 14
Number of bytes in response
data
When received
Section 8-3
257