The 7-Segment Display On The Jcu Control Unit; Control Cable Grounding - ABB ACL30 User Manual

The 7-segment display on the JCU control unit

The following table describes the indications given by the 7-segment display on the
JCU control unit. Multi-character indications are displayed as repeated sequences of
characters.
Display Meaning
L Loading application program or data from the memory unit. This is the normal
display immediately after powering up the drive.
Normal operation – drive stopped.
(Rotating display) Normal operation – drive running.
"E" followed by System error.
four-digit error
9001, 9002 = Control unit hardware failure.
code
9003 = No memory unit connected.
9004 = Memory unit failure.
9007, 9008 = Loading of firmware from memory unit failed.
9009...9018 = Internal error.
9019 = Contents of memory unit corrupted.
9020 = Internal error.
9021 = Program versions of memory unit and drive incompatible.
9102...9108 = Internal error.
"A" followed by Alarm generated by the application program. For error codes, see the
four-digit error Firmware Manual.
code
"F" followed by Fault generated by the application program. For error codes, see the
four-digit error Firmware Manual.
code

Control cable grounding

The shields of all control cables connected to the JCU control unit must be grounded
at the control cable clamp plate. Use four M4 screws to fasten the plate as shown in
below left diagram. The plate can be fitted either at the top or bottom of the drive.
The shields should be continuous as close to the terminals of the JCU as possible.
Only remove the outer jacket of the cable at the cable clamp so that the clamp
presses on the bare shield. At the terminal block, use shrink tubing or insulating tape
to contain any stray strands. The shield (especially in case of multiple shields) can
also be terminated with a lug and fastened with a screw at the clamp plate. Leave the
other end of the shield unconnected or ground it indirectly through a few nanofarads
high-frequency capacitor (e.g. 3.3 nF / 630 V). The shield can also be grounded
directly at both ends if they are in the same ground line with no significant voltage
drop between the end points.
Electrical installation 73