User manual

Publication 1797-6.5.1 - April 1999
2-2 Understanding Configurable FLEX Ex Analog Module Features
Important:You must use the I/O configuration portion of your PLC
programming software to select and configure these features.
This manual assumes familiarity with the programming
software. A brief description of each module feature is
provided here.
For more information on your programming software, see the
software user manual.
Selecting a 1797-IE8 FLEX Ex
Analog Input Module’s
Operating Features
All features of the 1797-IE8 analog input module are independently
configurable in two four-channel groups (channel 0-3 & channel 4-7).
Important:The default selection value for all parameters is 0.
Fault Mode
Your 1797-IE8 module is capable of indicating various fault conditions,
depending on the input signal value. Use the Fault Mode feature to enable
or disable two alarms:
• Remote Fault alarm
• Local Fault alarm
Use your programming software to set the Fault Mode bit to 0 to disable
these alarms. Set the bit to 1 to enable them.
Important:Fault Mode will only enable or disable the Remote and Local
Fault alarms. It does not affect the Underrange and Overrange
alarms. They are always active.
For more information on Remote and Local Fault alarms, see page 1-5.
Remote Transmitter Error Up or Down
A second feature of your input module that affects use of the Remote Fault
alarm is the Remote Transmitter Error Up or Down feature. Used in
conjunction with the High Low Error level, this feature designates whether
remote faults are displayed with input signal readings beyond the high or
low signal levels normally used by the module.
When setting the Remote Transmitter Error Up or Down feature in your
programming software, set this feature’s bit to 0 to select up. Set the bit to 1
to select down.
For more information on Remote and Local Fault alarms, see page 1-5.