Omron E5ZN Operation Manual page 187

Temperature Sensing Errors
Settings Selector settings for the input type of temperature
sensor are incorrect.
Celsius-Fahrenheit designation of the E5ZN is
incorrect.
The PV appears to be incorrect due to the input
shift setting.
Data setting unit is incorrect.
Program of the host is incorrect.
Operation Temperature sensor input terminals of the E5ZN
thermocouple input model have been short-cir-
cuited.
Temperature sensor connected to the E5ZN has
been replaced or the switch or selector settings of
the E5ZN have been changed while the power is
ON.
Simple Method for Checking Temperature Sensors
Platinum Resistance Thermometer
1,2,3...
Thermocouple
1,2,3...
Probable cause
1. Connect a 100- Ω resistor between the A and B temperature sensor input
terminals and short-circuit the B terminals.
2. If the temperature sensed by the E5ZN is 0.0 ° C or 32.0 ° F, the E5ZN is op-
erating normally.
1. Short-circuit the temperature sensor input terminals of the E5ZN.
2. If the E5ZN senses the temperature of the terminal block of the E5ZN, the
E5ZN is operating normally.
Remedy
Correct the input type setting.
°C/°F selection
Correct the
Set the input shift to 0.0.
Change the program of the host.
Connect a thermocouple to the temperature sen-
sor input terminals.
Turn OFF the power to the E5ZN, and then turn
ON again.
Section 8-3
switch setting.
173