Spectrum Controls 1756sc-IF8u - Manual (Page 56)

44 ControlLogix ™ Universal Analog Input Module
Temperature Measurement:
.RTD3Wire
0, 1 BOOL
0 = Two wire RTD or resistor if RTD or resistor input type for this
channel is selected.
1 = Three or four wire RTD or resistor if RTD or resistor input type for
this channel is selected.
.DisableCyclicLead
0, 1 BOOL
0 = If 3 or 4 wire RTDs or resistors are selected then the lead resistances
are also read and compensated for. Note: Only one channel’s lead
resistance is read during each all channel scan, every 5 minutes. This
reduces the effect of the increased scan time due to lead measurements.
This means, however, that the lead resistance for any given channel will
be measured only once every 5 minutes if all channels are enabled with 3
or 4 wire RTDs.
1 = RTD lead resistance will only be read for this channel on power up,
reset, and reconfigure.
.TenOhmOffset
-100 to 100 INT
An optional offset in ohms to be applied to the 10 ohm copper RTD input
type. -100 to 100 correspond to -1.00 to 1.00 ohms.
For example, if the resistance of a copper RTD used with this channel
was 9.74 ohms at 25oC, you would enter -0.26 in this field.
Process Alarms:
Process alarms alert you when the module has exceeded configured high
or low limits for each channel. You can latch process alarms.
These are set at four user configurable alarm trigger points:
· High high
· High
· Low
· Low low
You may configure an Alarm Deadband to work with these alarms. The
deadband allows the process alarm status bit to remain set, despite the
alarm condition disappearing, as long as the input data remains within the
deadband of the process alarm.