C500BC061 Omron, C500BC061 Datasheet - Page 60

• Manufacturer Part Number: C500BC061
• Description: BACKPLANE
• Manufacturer: Omron

Specifications of C500BC061

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

C500 (3G2A5) Host Link Units
C120 and C500
Minimum response time =
44
Minimum Response Time
Buffer for Host
Link Unit # 0
PC for Host
Link Unit # 0
Buffer for Host
Link Unit # 31
PC for Host
Link Unit # 31
Input
signal
Output
signal
Host computer
CPU reads
input signal
Input ON delay + Command transmission time + Cycle time of PC for Unit #0 + Response transmission
time + Host computer processing time + Command transmission time + Output ON delay
Input ON delay
Command/response for Unit # 0
Command
I/O refresh
In considering response times, it is important to remember the sequence of pro-
cessing that occurs during the PC cycle. The main factor that affects the re-
sponse time is the timing of inputs and outputs and of host computer processing
in relation to this sequence.
The following diagram illustrates the setup used in response time calculations
Although the C120 and C500 equations for the minimum and maximum re-
sponse times are the same as those for the C1000H and C2000H, the break-
down of the CPU’s cycle differs. These groups are thus treated in different sec-
tions.
The data flow that will produce the minimum response time is shown below. This
flow assumes that all signals and data transmissions are processed as soon as
they occur. The equation for the minimum response time is given below the dia-
gram.
Cycle time
Input
Host Link
Unit # 0
Response
PC
I/O response time
Cycle time
Host computer
processing time
Host link service
Cycle time
(50 ms)
Host computer
Command/response for Unit # 31
Command
Overseeing
Cycle time
Host link service
Host Link
Unit # 31
PC
Response
Output
x
output signal
CPU writes
Cycle time
Output ON delay
I/O refresh
Cycle time
(30 ms)
+
Section 2-2