LS Industrial Systems GLOFA G7M-DR20U, User Manual

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Chapter 7. Usage of Various Functions
7-75
4-wired type
Method of Connection between Pt and RTD Input Module
*1: RTD (Pt100 or JPt1000)
*:2: Shielded wire - The shields of the RTD and shields of wire should be connected to the FG of the RTD input module.
REMARK
The difference between the resistance values of the wires used should be 1
Ω
or less, or the accuracy shown
in 1) Performance specification could not be satisfied.
10) Program example
(1) A program for output of detected temperature value as a BCD value
a) Program explanation
The present A/D conversion value of the detected temperature value which is detected from the temperature-measuring
resistor Pt 100 is displayed on the BCD digital display by use of channel 0 of the temperature-measuring resistor input
module. The lamp turns on when the detected temperature value is a negative number and turns off when it is a positive
number
b) System configuration and parameter setting
RTD input module
Turns on when temperature
value is negative (%QX0.0.8)
BCD segment
( %QX0.0.0~%QX0.0.7)
Detected temperature
Input condition
(%IX0.0.0)
COM0