Hitachi LQE550, User Manual

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5 PROGRAMMING
5-7
5.3 Response Time
Figure 5-6 shows a plot of the response times the CPU link module takes to transfer G-register
data (A response time is the interval time that elapses before the data in the G-register in one CPU
(or LPU) is reflected in the G-register in another CPU (or other LPU) connected to the same link
line).
The response times indicated here are those that are typical where only the CPU link module is
mounted on the CPU mount base. If any other optional module, such as the ET.NET module, is
additionally mounted, longer response times may result than those shown in Figure 5-6.
Figure 5-6 Response Time
Average response time [ms]
Transfer areas per unit
900
800
700
600
500
400
300
200
100
0
0 2 4 6 8 10 12 14 16
: 1 word
: 8 words
: 16 words
: 32 words
: 64 words
Number of CPUs linked