Perle Systems SCS8C DC User Manual

 265

Settings

The 

 tab configures the I/O failsafe timer. The Failsafe Timer is enabled on a global 

basis and provides a trigger mechanism that can be configured for each channel when no I/O traffic 
has occurred for the specified amount of time. This traffic information would include any statistical 
data updates based on the refresh timer for Statistics. A Failsafe Action can be configured for each 
Digital Output channel, each Serial Signal Output pin (DTR and RTS), and each Relay channel to 
either Activate or Deactivate the output.
The Failsafe Timer has a different function when I/O Extension is enabled for Digital Output 
channels, Relay channels, or the Serial Signal Output pins (DTR and RTS). For I/O Extension, the 
Failsafe Timer provides a per channel or per serial signal output pin trigger mechanism that is 
activated when there are no TCP sessions for the specified amount of time.

Configure the following parameters:

Enables/disables the Failsafe Timer. This is the global setting that must be 
enabled to set the Failsafe Action on the channel for digital output and relay 

channels or output signal pins. When this timer expires because of no I/O 

activity within the specified time interval, the Failsafe Action set for the 
channel determines the action on the output. When the channel or serial signal 

pin is configured for I/O extension, the timer expires there are no TCP sessions 

for the specified time interval.
Default: Disabled

The number of seconds that must elapse before the channel/serial signal pin 

Failsafe Action is triggered. 
Range: 1-9999
Default: 30 seconds