C500BC031 Omron, C500BC031 Datasheet - Page 71

• Manufacturer Part Number: C500BC031
• Description: BACKPLANE
• Manufacturer: Omron

Specifications of C500BC031

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

C120 (3G2A6) Host Link Units
2-3-6
I/O Response Time
The processing that determines and the methods for calculating the minimum
and maximum times required from an input on one PC with a Host Link Unit to an
output on another PC with a Host Link Unit are described below. The transfer
between the PCs is handled through a host computer connected to both these
PCs.
Processing and calculations are described by PC model. Although more precise
equations may be written if required, those used in the following calculations do
not consider fractions of a cycle.
The calculations used in this section assume that all host computer commands
and PC responses require no more than one host link servicing period to com-
plete transmission. To compute response times for situations involving a longer
command and/or response, the number of host link servicing periods (i.e., the
number of cycles) required to complete the command or response would have to
be incorporated into the equations.
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
Input
Host Link
Unit # 0
PC
Cycle time
(50 ms)
Host computer
Host Link
Unit # 31
PC
Output
x
Cycle time
(30 ms)
+
Section 2-3
55