Unipulse DeviceNet F381A, Operation Manual

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151
9 SUPPLEMENTS
151
SUPPLEMENTS
Chapter
9
9-5.
Troubleshooting
Items Questions Answers
Sensor
Can four sensors be connected?
When the excitation voltage is 2.5V, up to four 350 Ω sensors can be
connected in parallel.
Use them as the total output current does not exceed 30mA.
Does the indicated value
display change according to the
unit of the sensor used? The indicated value is not converted according to unit change.
After change, perform actual load calibration or equivalent input
calibration.
Wiring and
connection
About the cables to be
connected to the terminal block
The analog input/output terminals are screw type. Directly connect
individual cables. For details, see "2-2
Sensor connection " on p.10.
For connection to the power input terminals, use 6mm or less crimp
contacts.
The power cannot be turned on.
Check to see if the power cord is connected properly.
Connect the power cord properly.
Check to see if the power supply is in the specified range. Use a power
supply in the specified range, and make proper connection confirming
plus and minus.
Setting and
operation
How can the decimal place be
changed?
The decimal place of HI limit, LO limit, etc., are in conjunction with
the decimal place set at the time of actual load calibration or equivalent
input calibration.
Perform calibration again, and change the decimal place.
No result/value is output, or a
result/value is abnormal.
Check to see if the output cable is connected properly. Connect the
output cable properly referring to the equivalent circuit diagram.
Check to see if the power is on. External input/output signals require
external power supply. Turn on the power.
Are the set data erased when the
power is turned off?
The set data are not erased even if the power is turned off.
Are the set data erased if no
power is applied for a long
time?
The F381A preserves the settings for approx. 5 years with the power
off.
However, the preservation period may become short depending on the
operating condition and installation environment.
If any number other than the
selectable items is selected in
setting, what happens? The maximum possible value in the setting range is set.
Example) If "5" is selected for the item the setting range of which is
"0," "1" and "2," "2" is set.
RS-232C
RS-232C communications
cannot be carried out.
Check to see if the communication cable is connected properly. Turn off
the power, and then connect the communication cable properly.
Check to see if the communication cable in use is proper.
Check the wiring, and connect the communication cable properly.
Check to see if the communication conditions between the F381A and
equipment connected are in agreement. Check the communication
conditions, and make the settings consistent with the equipment
connected.
Is any special program needed
for communications with a PC? Programming is necessary. Create software to exchange commands by
timing as required.
Option
Can two or more options be
mounted?
The following items can be mounted. (Four at the maximum)
- Analog input
(Voltage input, Line driver input)
- Communications (DeviceNet, CC-Link, Ethernet)
- I/O (Source type)
- SD card slot