channels need to demand the safety function gen.

[cherrybird]

Уважаемые коллеги, добрый вечер,
прошу помочь с переводом сабжу, и, собственно, предложения ниже.
During normal operation, both channels need to demand the safety function before
it can take place.
Это описание архитектуры 1oo2D
This architecture consists of two channels connected in parallel. During
normal operation, both channels need to demand the safety function before
it can take place. In addition, if the diagnostic tests in either channel detect
a fault then the output voting is adapted so that the overall output state then
follows that given by the other channel. If the diagnostic tests find faults in
both channels or a discrepancy that cannot be allocated to either channel,
then the output goes to the safe state. In order to detect a discrepancy between
the channels, either channel can determine the state of the other
channel via a means independent of the other channel.

Заранее благодарю.

[Rengo]

safety function исполняется только по запросу каналов

[cherrybird]

Спасибо, а к чему относится it can take place?

[Ослик]

Чтобы выполнить функцию, влияющую на безопасность, на неё должен поступить запрос от обоих каналов.

[Rengo]

before it can take place - прежде чем она (функция) будет исполнена

[cherrybird]

Благодарю!