Omron E5ZE Operation Manual page 75

Hardware Test
Test Item Selection
After the E5ZE is in hardware test mode, select the tests to be performed using the FUNCTION switch, as shown in
the following table.
Temperature Sensor Input Test
• In this test, if a temperature sensor is correctly connected to a control point, the control output indicator (CH0 to
CH7 or H0 to H7) corresponding to the control point will be lit.
• If the control indicator is not lit, recheck the wiring connecting the E5ZE to the temperature sensor. The cause of
the indicator not lighting may be as follows:
Thermocouple:
A lead of the temperature sensor is disconnected or incorrectly wired.
Platinum resistance thermometer:
A lead of the temperature sensor is disconnected or incorrectly wired or the A and B terminals of the temperature
sensor are short-circuited.
Procedure
1, 2, 3...
Memory Bank Designation Input Test
If a contact connecting a memory bank designation input is ON, the MB designation input indicator (MB0 to MB2)
corresponding to the contact will be lit. If the MB designation input indicator is not lit, check that the input is wired
correctly.
Procedure
1, 2, 3...
Control Output and Alarm Output Test
In this test, a control output or alarm output is turned ON (100% output) and the indicator for the output will light.
Depending on the wiring, an output may be unintentionally produced for the wrong control point. Make sure that
any output that is ON will not affect the object being controlled when performing this test.
74
FUNCTION switch
Test
Pin 3
Commu- OFF OFF
nications
test
Memory OFF OFF
bank desig-
nation input
Control out- ON OFF
put and
alarm output
Temperature OFF ON
sensor input
CT input OFF OFF
1. While in hardware test mode, set pins 4 and 8 of the FUNCTION switch to
OFF.
2. Make sure that the MB0 indicator is lit.
3. Set the INPUT selector according to the temperature sensor connected to
the control point.
4. Make sure that the control output indicators corresponding to each of the
control points are lit.
1. While in hardware test mode, set pin 8 of the FUNCTION switch to ON.
2. Turn ON or OFF the contact corresponding to the memory bank designation
input.
3. Make sure that the MB designation input indicator corresponding to the con-
tact that is ON is lit.
Pin 4 Pin 5 Pin 8
OFF ON
OFF ON
OFF ON
OFF ON
ON ON
Appendix E
Test check- Commu-
ing indica- nications
tor path
None
Connected
Not
connected
MB0 lit
MB1 lit
MB2 lit