16
vacon • 250 Appendix 6 - Fieldbus option board communication
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
16.6
Fast safety fieldbus communication
The fast safety mode uses the same communication methods as in "Fast mode" (Figure 56), but also
transfers safety "black channel" data used by the safety fieldbus.
NOTE!
This mode is automatically enabled, if an extended safety option board is connected to slot D
and the safety fieldbus is activated and cannot be set by the user. This mode is also automatically
turned off when the safety option board is removed.
16.7
Fast PROFIBUS fieldbus communication
NOTE!
This mode is not recommended for new installations.
There is also a second type of fast communication mode, the Fast PROFIBUS mode originally meant
for the OPTC3/C5 PROFIBUS board. This mode can be seen in Figure 57. This mode can achieve
same latencies for process data as the fast mode introduced in Chapter 16.4 Fast fieldbus
communication. However, this mode imposes the following limitations:
•
No service data is available
•
Option board can be run only in Bypass mode.
Figure 57. Fast PROFIBUS communication
IO Data
Cyclic
x ms
Software
Option Board
Drive Control Board
Only
in startup!
SPI
1ms
Application
task
1-50ms
Process
Data
Application
task
50-500ms
Service
Data
11724_uk
SPI
1ms
Summary of Contents for optea
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