C500RM201 Omron, C500RM201 Datasheet - Page 83

• Manufacturer Part Number: C500RM201
• Description: WRITE MASTER
• Manufacturer: Omron

Specifications of C500RM201

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

C200H Systems
6-4
74
Example Computations
Transmission Time for
Remote I/O Errors
Scan Time
Minimum I/O Response
Times
Maximum I/O Response
Times
C200H Systems
Calculations would be as shown below for input and output ON delays of
10 ms and a scan time of 20 ms. This example uses a C1000H system with
only one Slave Rack connected to a Master and four words allocated on the
Slave Rack. Because there is only one Slave, T
T
T
Minimum I/O Response Time
Time = 10 ms + 20 ms x 2 + 2.2 ms + 10 ms
Maximum I/O Response Time
Time = 10 ms + (20 ms x 3) + (2.2 ms x 2) + 2.2 ms + 10 ms
The above computations assume that there is no remote I/O error (including
power interruptions). If an error occurs for a Slave, the response time would
be increased by 20 ms for each Slave connected to the same Master as the
Slave where the error occurred. If an error occurs for a Remote Terminal, the
overall delay time would be increased by 5 ms for each Remote Terminal
connected to the same Master as the Remote Terminal where the error oc-
curred.
With C200H Remote I/O Systems, only the scan time of the PC needs to be
considered in computing the I/O response times as long as the remote I/O
transmission time is negligible and smaller than the scan time. The scan
time, however, is increased by the presence of the Remote I/O System
The scan time for Remote I/O Systems is increased by the following amount
for each Master (approx.):
1.3 ms + 100 s x (number of 8-pt. Units controlled through the Master +
(number of 16-pt. Units controlled through Master x 2)) +
Where,
A more detailed explanation of scan time operation and calculations is avail-
able in the C200H PC Operation Manuals .
The minimum response time occurs when all signals are processed as soon
as they are received. Here, three scans are required so that the program is
executed.
Time = Input ON delay + scan time x 3 + output ON delay
The maximum response time occurs when the input just misses the program
execution portion of the scan, meaning that processing must wait for the next
transmission and then the next (i.e., the fourth) scan.
Time = Input ON delay + scan time x 4 + output ON delay
RT
RM
= 200 s x number of words used by Special I/O Units
=
=
= 62.2 ms
= 86.6 ms
1.4 + (0.2 x 4) = 2.2 ms
2.2 ms
RM
and T
RT
are the same.
Section 6-4