Disconnection Detection (Afp7Rtd8) - Panasonic FP7 Series User Manual

6.7 Disconnection Detection (AFP7RTD8)

6.7 Disconnection Detection (AFP7RTD8)

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Overview of functions
This function is to warn of the error state by converting to a digital value in the range (K30000)
which is different from the values converted in the normal state when the disconnection is
detected in the RTD input unit.
● In the figure below, disconnection is detected when any of the A, B and b terminals is
disconnected. Also, when all the three terminals are open, the disconnection is detected.
(Note 1) The above specifications are applied from the lot manufactured in November 2016 (production lot
nos.161100 or more). The production lot number is written on the label on the side face of the unit,
under the version number.
(Note 2) As for the units manufactured in November 2016 or earlier (production lot nos. smaller than 161100),
the disconnection is detected only when the line of the A terminal is disconnected. When either line of
the B terminal or b terminal is disconnected, it is not detected as disconnection. Also, when all the
terminals are open,the instruction value becomes unstable.
● On the RTD input unit (AFP7RTD8), the disconnection detection execution relay and the
disconnection detection flag cannot be used.
6-16 WUME-FP7TCRTD-04