Rockwell Automation Allen-Bradley POINT Guard - Configure Safety Analog Input Alarms (Optional); Rockwell Automation Publication 1734-UM013 J-EN-P - July

96 Rockwell Automation Publication 1734-UM013J-EN-P - July 2014
Chapter 5 Configure the Module in a GuardLogix Controller System
4. Configure an input filter.
A single-pole, anti-aliasing filter of 10Hz is followed by a four-pole digital
filter. Choose from the following available corner frequencies.
• 1 Hz (recommended for Tachometer mode)
• 5 Hz
• 10 Hz
• 50 Hz
For more information on the filter frequencies and step response, see the
technical specifications for the 1734-IE4S module, beginning on page 164
or Digital Input Filter
on page 32.
5. Assign High and Low Engineering scaling values for the inputs, if desired.
The valid range for both the High and Low Engineering settings is
-30000…30000, in increments of 1. Scaling lets the module report in
engineering units such as degrees, PSI, CFM, percent, and so on, rather
than in raw counts.
When you click Apply, channel 1 is set to the same value as channel 0 and
channel 3 is set to the same value as channel 2 if the channel operation is
configured as dual channel equivalent.
6. Set the Sensor Power Supply value to External or Module to indicate how
each sensor will be powered.
Configure Safety Analog Input Alarms (optional)
TIP
Set this value to Module to supply power to the sensors connected to
the POINT Guard Analog Input module. This allows the module to
detect a loss of sensor power.
TIP
If you are using a Dual-channel Analog (DCA) safety instruction in your
application program, we recommend that you do not configure these values
on the module. Instead, to facilitate troubleshooting, use the application
program to check for high and low alarm values via the Dual Channel Analog
Input instruction or other data comparison instructions.