Weidmuller WI-I/O 9-L: Wireless I/O Transmitter / Receiver v1.3 - Manual (Page 73)

WI-I/O 9-L Configuration Manual
WI-I/O 9-L Wireless I/O page 73 of 108
Setpoints let you generate a discrete setpoint status signal based on the value of an analog
input.
Each setpoint status is associated with two setpoint values - a high threshold value and a low
threshold value.
When the analog level moves above the high setpoint value, the setpoint status turns off.
When the analog level moves below the low setpoint value, the setpoint status turns on. If the
analog input remains between the threshold values, the setpoint retains its previous value
(i.e. does not change state). This provides a measure of hysteresis.
Note
The high setpoint MUST be higher (i.e. greater value) than the low setpoint.
The analog input and the thermocouple input setpoints allow selection between ten different
threshold pairs using the rotary switch on the front panel.
For more information on translating analog signal types, see Appendix A – Tables for
translating different analog signal types on page 104.
WI Series lets you set the following setpoints:
Feature Description Example
Analog
setpoint
This setpoint is associated with the 4-20 mA analog input.
One of ten different pairs of (low setpoint, high setpoint) is selected
by the position of the rotary switch on the front panel of the WI-I/O
9-L-T module. Alternatively the analogue setpoint threshold values
can be set to single values (select the Single tab) independent of
the rotary switch position.
“NO” indicates the switch position for this setpoint setting.
Low SP and High SP are the low and high threshold values.
Units: By changing the Units setting, the values of high and low
thresholds can be displayed in different format.
• Raw - data format used by Weidmuller, Inc. modules for
transferring analog values. 16384 corresponds to 4mA, or 0%
reading, and 49152 corresponds to 20mA or 100% reading
• mA –actual milliamp value for a 4-20 mA input.
• % - percentage of full scale. 4mA is 0%; 20mA is 100%.
For more information on the relationship between different analog
units in the WI-I/O 9-L-T, see Appendix A – Tables for translating
different analog signal types on page 104.