Data Processing Time; Calculation Example - Omron SYSMAC CS1W-CLK11 Operation Manual

Data Link I/O Response Time
CS/CJ-series PCs, CVM1
and CV-series PCs in
Synchronous Mode,
CQM1H-series PCs, and
C200HX/HG/HE PCs
PC processing
Basic processing
8-3-2

Data Processing Time

Data link scale
Data link is established for both areas 1 and 2
Data link is established for only area 1 or area 2
Note
8-3-3

Calculation Example

198
When a CS/CJ-series, CQM1H-series, CVM1, or CV-series PC is operating in
synchronous mode, a CQM1H-series, or a C200HX/HG/HE PC is operating,
data exchange with the Controller Link Unit is executed as interrupt process-
ing during peripheral processing for the PC cycle. Data exchange timing is as
follows:
PC cycle time
CPU Bus
Execution
Unit service
I/O refreshing
Interrupt processing
for data exchange
If interrupt processing for data exchange is executed, the PC cycle time will be
lengthened by the time required for the interrupt processing (see 8-3-2 Data
Processing Time below).
The time required for interrupt processing for data exchange (data processing
time) can be roughly estimated as shown in the following table.
0.001 × Total number of data link words + 1.7 (ms)
0.001 × Total number of data link words + 1.4 (ms)
The number of words processed in a single data exchange is shown in the fol-
lowing table for each series of PC. If the number of data link words exceeds
the value shown in the table, data exchange will be executed as several sepa-
rate processes.
PCs
CS/CJ-series PCs
CVM1 and CV-series PCs
C200HX/HG/HE PCs
CQM1H-series PCs
1. Use the above equations only if only one Controller Link Unit is mounted
on the PC. If other CPU Bus Units are mounted on the PC, obtain the re-
fresh times for each CPU Bus Unit and add to the above equations.
2. The execution of some items takes precedence over data link area refresh-
ing. For example, data link area refreshing will not take place during exe-
cution of the SEND(192), RECV(193), or FAL(006) instruction.
The data links of the Controller Link Unit require a slight time delay from the
time the data link area of one node is changed until this change is reflected in
the data link area at another node. This time delay is called the data link I/O
Programming
Device/Host Link
service
Basic processing
Equation for estimating data processing time
Words per data exchange
Approx. 7,800 words
Approx. 3,700 words
Approx. 4,000 words
Approx. 1,200 words
Section 8-3
Execution