Configuring the AS-Interface safety monitor
4.3 Creating and changing a configuration
ASIMON V3 - Configuration software for AS-Interface safety monitor
Programming and Operating Manual, Edition 09/2008, GWA 4NEB 333 1558 02 DS 02 43
4.3.1 Monitoring devices
The monitoring devices constitute the actual safe switching components of the OSSD(s) in the
configuration.
For the safe monitoring devices, a distinction is made depending on type between:
Double channel, forced components
Upon actuation of an emergency-off switch with its two redundant contacts, the two contacts
open simultaneously. As a result of this construction, both contacts are always either open or
closed. If one of the two contacts closes or opens either too early or too late, an error results
after a tolerated transition time has passed.
The functional device for double channel, forced components can, thus, be used for applica-
tions such as
emergency shutdown switches
safety guards
active optoelectronic protective device
zero-speed relays
Here, both the direct connection of an integrated AS-Interface slave as well as the connection
of a conventional device via a safe coupling module are possible. Local acknowledgement and/
or the startup test are available as options.
Double channel, dependent components
The monitoring to determine whether a safety guard is open or closed is performed by two pro-
tective switches. If this safety guard is opened or closed, the protective switches are not actu-
ated simultaneously. In the double channel dependent functional device, a synchronisation
time can, therefore, be specified. Both switches must close within this synchronisation time. If
the synchronisation time is exceeded, the start-test state results.
The safety monitor also monitors the switches to ensure that one of the two end positions "both
switches open" or "both switches closed" is always achieved.
The functional device for double channel, dependent components can, thus, be used for appli-
cations such as
safety guards with two protective switches
two-handed operations
Here, both the direct connection of an integrated AS-Interface slave as well as the connection
of a conventional device via a safe coupling module are possible. Local acknowledgement and/
or the startup test are available as options.