Siemens LMV 5 Series, Technical Instructions, Page: 363 / 374

LMV Series Technical Instructions
Document No. LV5-8000
SCC Inc. Page 33 Appendix A
Remote Setpoint (continued)
Example: Temperature Sensor Wired to Terminal X60
LC_OptgMode = IntLC X62
Ext Inp X62 U/I = 4..20 mA
MeasureRangePtNi = 302 °F
Desired remote setpoint range = 180-270 °F
A 4-20 mA signal on terminal X62 scales the setpoint from 32-302 °F. Parameters “Ext
MinSetpoint” and “Ext MaxSetpoint” need to be utilized to get the appropriate setpoint range.
=
180℉ − 32℉
302℉ − 32℉
=
148
270
= 55%
=
270℉ − 32℉
302℉ − 32℉
=
238
270
= 88%
With these parameters set, the following input signals will scale the setpoint accordingly:
4 – 12.8 mA = 180 °F (limited by “Ext MinSetpoint”)
12.8 – 18.1 mA = 180 - 270 °F
18.1 - 20 mA = 270 °F (limited by “Ext MaxSetpoint”)
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