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Troubleshooting
Problem
Possible Cause
Corrective Action
Despite start signal
(green LED not
illuminated) dispensing
does not occur
No 24 V IN_STOP signal on pin 15
with respect to GND_IO
Apply 24 VDC to pin 15 or rewrite the control
program with “Stop” = 0.
No 24 V IN_FAULT_PLC signal on
pin 17 with respect to DGND
Connect the PICO
Toµch
controller, correct
the issue with the
Toµch
controller, or apply
24 VDC to pin 17.
PICO controller not in correct
Automatic Mode
Inputs IN1–IN10 function only when Automatic
Mode is set to active. Starting via fieldbus
works only when Automatic Mode is set to
Fieldbus.
Display:
Check battery
After switching on the device,
the back-up battery for the time
component is checked. In this case,
the battery level is too low to safely
store data.
Replace the battery. Refer to “Replacing the
Battery” on page 49.
Display:
Description too long
The Description field in a control
program file (refer to “Characteristics
of a Control Program” on page 40)
on the SD card is too long. The
maximum number of characters
is 8000 (including all control
characters).
Shorten the description and repeat the
download.
Display:
Error CAN
Faulty internal communication
Repeat the action. If the error persists, return
the device for service.
Display:
Error Flash/EEPROM
Faulty internal communication
to the Flash or EEPROM (e.g.,
due to extreme electromagnetic
interference)
Repeat the action. If the error persists, return
the device for service.
Display:
Error RTC
Faulty internal communication with
the time component (RTC—Real
Time Clock)
Repeat the action. If the error persists, return
the device for service.
NOTE:
Dispensing and other functionality
are not affected; however, under given
circumstances, false data/time is displayed
or false data/time information occurs when
uploading.
Display:
Memory error
Faulty internal communication to
EEPROM (e.g. ,due to extreme
electromagnetic interference)
Repeat the action. If the error persists, return
the device for service.
Display:
Container empty
Change container?
Execute
According to the calculation, the
indicated container is empty; no
response signal to PLC; dispensing
sequence is not automatically
interrupted; message appears every
5 minutes until container is changed
Check the quantity in the container and decide
whether to change the container (Enter) or
continue dispensing (ESC).
Continued on next page
PICO Controller 2+2-XCH-V3
50
www.nordsonefd.com [email protected]
+1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.