The maximum allowable field wiring resistance between the transmitter and the IOTA connection terminal is dependent upon the voltage requirement of the transmitter. The formula for calculating the maximum wiring resistance for the Series C UIO channel used as an analog input is given by the following equation.
Green IOM is powered.
Status
LED
Off There is an IOM fault or the LED is bad.
The module is in a hard failure state. In this state, the module cannot be
used to gather information from or send information to attached field
devices.
ACTION: A user must either cycle power to the module or replace the
module to correct the failure.
Green IOM operation is Okay.
Primary Run/Idle
The module is operating 100% correctly, and the module if commanded;
will either gather inputs from the attached field devices or send outputs to
the attached field devices.
NOTE
When used in a redundant I/O system, a module with a green
LED is often referred to as the primary I/O module.
Green -
flashing
(toggle once
per second)
Primary Run/Idle with Soft Failure
The module is operating, but it is operating in a diminished state as one or
more soft failures have been identified.
Amber The module is either not configured or operating as a secondary.
Not Configured - The module has not been configured.
Secondary - The module is operating 100% correctly as the secondary
module. This does not imply that it is synchronized with the primary IOM.
Amber -
flashing
(toggle once
per second)
Not Configured with Soft Failure - The module has not been configured
and is operating with one or more active soft failures.
Secondary with Soft Failure- The module is operating as the secondary
module in a diminished state as one or more soft failures have been
identified.
Red Power-on - The device is in a non-standard, transient state and not
controlling any part of your plant or process.
Module has just started and power-on self-test is running. During this time,
there is no communication to the module.
Red - flashing
(toggle once
per second)
The device is in a non-standard, transient state and not controlling any part
of your plant or process.
Alive, Ready for Firmware Upgrade - The module is ready to receive an
update to its internal programming instructions.
Red - fast
flashing,
(toggle one
quarter (1/4)
second)
The device is in a non-standard, transient state and not controlling any part
of your plant or process.
Alive, Firmware Upgrade in Progress - The module is receiving an update to
its internal programming instructions. Do not remove power to the module.
Off Failed - The module has hard failed. The module is no longer
communicating and must be power cycled or replaced.
DO channels transition to the configured fault state. If field power is lost, all
outputs go unpowered.
AO channels will go unpowered.
