F6705 HIMA PES Electronic System Module

Description

In case of faults of output, F6705 coupling and central modules and group

switch off

In the system descriptions of the safety related PES H51q-MS, -HS, -HRS

the ways for shut down if a fault occurs are shown. The reactions of the

systems are fixed or they can F6705 be defined in the user’s program by means

of the building block H8-STA-3 and with activating of a system variable for

emergency off.

F6705 Explanations to the table:

1) Module switch off

A faulty testable output module with integrated safety shutdown will

be switched automatically to the safe deenergized safe status.

2) Group shut down

If it is requested, F6705 a group shut down may be agreed in the user’s program

so, that all testable output modules appertainig to the group with the faulty

module are also switched off.

Inside the user’s program up to 10 testable output modules can be assi

gned to one group by means of the building block H8-STA-3.

3) Switch off WD of the appertaining CU

In this case the watch dog signal (WD) of the appertain-ing central module

will be switched off.

If systems with redundant central modules and a common I/O bus are

used then the output modules are related to both central modules. In case

of a fault both the watch dog signals of the central modules are switched

off. F6705 That means all the I/O modules are switched off.

If systems with redundant central modules and redundant I/O bus are

used then the output modules are related to one central module and one

I/O bus. In case of a fault only the watch dog signal of the related central

module is switched off. That means only the related I/O modules are swit

ched off.

4) Switch off of the appertaining coupling module (IO-CON)

In this case the watch dog signal (WD) of the appertaining coupling modu

le will be switched off. That means that all I/O modules related to this cou

pling module will be switched off.

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