C500RM201 Omron, C500RM201 Datasheet - Page 82
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C500RM201
Manufacturer Part Number
C500RM201
Description
WRITE MASTER
Manufacturer
Omron
Datasheet
1.C500RM201.pdf
(130 pages)
Specifications of C500RM201
Leaded Process Compatible
No
Peak Reflow Compatible (260 C)
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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C1000H and C2000H Systems
6-3
Example Computations
Transmission Time for
Remote I/O Errors
Remote I/O Transmission
Times
Minimum I/O Response
Times
Maximum I/O Response
Times
C1000H and C2000H 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 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 + 2.2 ms + 10 ms
Maximum I/O Response Time
Time = 10 ms + (20 ms x 2) + (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 C1000H and C2000H Remote I/O Systems, both the scan time of the
PC and the transmission time required by the Remote I/O System need to be
considered in computing the I/O response times.
The remote I/O transmission time is computed as follows:
T
T
T
The minimum response time occurs when all signals are processed as soon
as they are received. Because remote I/O processing is handled in parallel
with program execution, two scans are required so that the program is ex-
ecuted.
Time = Input ON delay + (scan time x 2) + (T
The maximum response time occurs when the input just misses both the first
remote I/O transmission and the program execution portion of the scan,
meaning that processing must wait for the next transmission and then the
next (i.e., the third) scan.
Time = Input ON delay + (scan time x 3) + (T
ON delay
RT
RM
RM
RT
TT
=
=
=
=
=
=
=
=
= 42.2 ms
= 66.6 ms
1.4 + (0.2 x 4) = 2.2 ms
2.2 ms
Total Slave transmission time for one Master
Transmission time for each Slave
1.4 ms + (0.2 ms x n)
Where n = number of I/O words on the Slave Rack
Remote Terminal transmission time
0.2 ms x m
Where m = number of Remote Terminals
T
RT
+ T
TT
RM
and T
RT
are the same.
RT
RM
or T
x 2) + (T
TT
) + output ON delay
RT
or T
Section 6-3
TT
) + output
73
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