Festo CPX-FVDA-P2 Original Instructions Manual page 35

System overview CPX-FVDA-P2
Channel-wise passivation
Channel-wise passivation can be switched on or off via bit 7 of byte 1.
As long as the function is inactive (0 = Off), the output module safely switches off all output channels
even in the case of an individual channel error (in accordance with the PROFIsafe specification) and
signals this error to the F-Host via the "FV_activated" and "Device Fault" flags. The F-Host then passiv-
ates the output channels of the module (F-Slave), isolates the module and sets the "Activate_FV" con-
trol bit.
CAUTION!
If the module determines that the cause of an error is no longer present, it will withdraw the
"Device_Fault" flag. The F-Host must evaluate this and can only withdraw the "Activate_FV" control bit
when a safe restart is possible, or the hazard can be contained through other measures. The technical
possibilities can be found in the documentation of the relevant F-Host.
If a channel error occurs when the function is active (1 = On), the output module safely switches off
only the output channel in which the error occurred. Unaffected output channels remain uninfluenced
and the module remains integrated.
In addition to the current status, the module signals the channel error status to the controller via the
input image (è Tab. 21 Bit pattern of the input data (F-user data, byte 0 and byte 1), channel error
status).
Input data
In byte 0, the output module returns the logical actual statuses as well as the statuses of the monitor-
ing flags to the F-Host as input data
(è Tab. 21 Bit pattern of the input data (F-user data, byte 0 and byte 1)). This makes it possible to
check the status of the monitoring flags.
The setting of the "Channel-wise passivation" parameter is returned in byte 1. If channel-wise passiv-
ation is switched on through the bits "Channel error status of channel ... ", the errors detected by the
module are signaled. These errors can be evaluated by the F-Host.
Festo — CPX-FVDA-P2 — 2018-10b 35