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132 IOLAN DS1/TS2 User’s Guide, Version 3.4
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 channel (DTR and RTS), and
each Relay channel to either Activate or Deactivate the output.
Field Descriptions
Configure the following parameters:
Embedded When this option is selected, the address of the slave Modbus device is
embedded in the message header.
Default: Enabled
Remapped Used for single device/port operation. Older Modbus devices may not include a
UID in their transmission header. When this option is selected, you can specify
the UID that will be inserted into the message header for the Modbus slave
device. This feature supersedes the Broadcast feature.
Default: Disabled
Remap UID Specify the UID that will be inserted into the message header for the Slave
Modbus serial device.
Range: 1-247
Default: 1
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 outputs and relays.
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.
Default: Disabled
Timeout The number of seconds that must elapse with no I/O activity before the channel
Failsafe Action is triggered.
Range: 1-9999
Default: 30 seconds