C500RM201 Omron, C500RM201 Datasheet - Page 81
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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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C500 Systems
6-1
6-2
72
Remote I/O Transmission
Times
Minimum I/O Response
Times
Maximum I/O Response
Times
Introduction
C500 Systems
!
Caution
The time required to produce a programmed output to an input within a Re-
mote I/O System varies with the scan time of the PC, the transmission time of
the Remote I/O System, and the timing of the input.
The processing that determines and the methods for calculating maximum
and minimum response times from input to output are provided in this sub-
section. Calculations assume that both the input and the output are located
on Slave Racks in a Remote I/O System.
Although more precise equations are possible if required, equations used for
the following calculations do not consider fractions of a scan.
In looking at the following timing charts, it is important to remember the se-
quence processing occurs during the PC scan, particular that inputs will not
produce programmed-actions until the program has been execution.
Noise may increase I/O delays.
With C500 Remote I/O Systems, both the scan time of the PC and the trans-
mission 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, meaning only one scan is required to execute the pro-
gram before the output is made.
Time = Input ON delay + scan time + (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 scan.
Time = Input ON delay + (scan time x 2) + (T
ON delay
RM
RT
TT
=
Input
=
=
=
=
=
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
RT
or T
RM
TT
) + output ON delay
x 2) + (T
RT
Output
or T
Section 6-2
TT
) + output
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