Input Channels view parameters

The
Input Channels
 view includes these parameters:
Parameter
Description
Channel
Displays the channel number to which this configuration applies.
Input Type
Sets the input type for the channel. Available options are:
  • Voltage
  • Current
Input Range
Sets the input range for the input type. Ranges vary according to the selected
Input Type
. Available options are:
  • -10 V to 10 V
  • 0 V to 5 V
  • 0 V to 10 V
  • 0 mA to 20 mA
High Signal
Sets one of the four constants in the scaling equation.
High Signal
 is in terms of the input signal units and corresponds to
High Engineering
 when scaled.
High Signal
 must be greater than
Low Signal
.
Low Signal
Sets one of the four constants in the scaling equation.
Low Signal
 is in terms of the input signal units and corresponds to
Low Engineering
 when scaled.
Units (Signal)
Shows the unit of measurement for
High Signal
 and
Low Signal
.
High Engineering
Sets one of the four constants in the scaling equation.
High Engineering
 corresponds to
High Signal
 and helps determine the engineering units that the signal values scale into.
Low Engineering
Sets one of the four constants in the scaling equation.
Low Engineering
 corresponds to
Low Signal
 and helps determine the engineering units that the signal values scale into.
Units (Engineering)
Shows the unit of measurement for
High Engineering
 and
Low Engineering
 and for the channel’s input value.
Digital Filter
Specifies the time constant, in milliseconds, for a digital first order lag filter on the input. The digital filter smooths input data noise transients for the selected channel on the device. A value of 0 disables the filter.
Disable Alarms
Determines whether process alarms are generated.
  • If selected, the device does not generate process alarms.
  • If cleared, the device generates process alarms.
Real Time Sample (RTS)
Specifies how often, in milliseconds, the device scans its input channels. After the channels are scanned, the device multicasts the data.
The selected Real Time Sample (RTS) period applies to the entire device. You cannot set a different value for each channel.
The RTS period controls how often the device prepares new readings. The Requested Packet Interval (RPI) controls how often the device sends its current readings to the controller. Ideally the RTS and RPI should be identical so that each reading is sent to the controller only once at the time of sampling.
Synchronize sampling with other devices
Allows all the 1756-IF4FXOF2F devices in a rack to synchronize the time in which samples are taken. The default is unchecked meaning no synchronization.
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