6F8C0921
17
4.2 Cyclic Transmission Time
4
4.2 Cyclic Transmission Time
The cyclic transmission time depends on the transmission speed, number of slaves, and
the number of transmitted words.
The time required to read from the PF311 output area, transmit to slave, receive from
slave, and write to PF311 input area is shown in the following table. (Excluding controller
I/O time and slave side I/O time.)
These are actual measured values when an HMS ABS-PDP is connected as slave.
4.3 Startup Procedure
The following configuration is used as an example to describe the startup procedure.
Figure 4-3 Startup procedure configuration example
See chapter 5 , 6 and section 9.3
Table 4-3 Cyclic transmission time
Transmission speed 12 Mbps 1.5 Mbps
Configuration 1 to 1 1 to 4 1 to 4
Transmitted words Transmit: 16,
Receive: 16
Transmit: 64,
Receive: 64
Transmit: 64,
Receive: 64
Transmission time Approx. 4 ms Approx. 5 ms Approx. 10 ms
1
Provide the following modules, tools, and cables.
• Base unit • Power module • S3 controller
• PF311 • PF312
• Tool PC (May be shared between engineering tool and configurator.)
• Integrated controller engineering tool (including PC connection cable)
• PROFIBUS configurator (SyCon)
(The above PC connection cable may be used.)
• PROFIBUS transmission cable (with connectors at both ends)
S3
PF
311
PS
S3
PF
312
PS
Configurator
(SyCon)
Transmission cable
32 words transmit
32 words receive
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