Perle Systems IOLAN SCS - Manual (Page 239)

239
Settings
Failsafe Timer Functionality
Overview
The Failsafe Timer 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/management has occurred for the specified amount of time. 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.
Field Descriptions
Configure the following parameters:
Enable I/O Failsafe
Timer 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
Timeout The number of seconds that must elapse before the channel/serial signal pin
Failsafe Action is triggered.
Range: 1-9999
Default: 30 seconds