Mitsubishi FREQROL-SF Troubleshooting Manual page 29

(3) Alarm No.15 (ME2) Memory Error 2
[The integrity of the contents of
the 2-port RAM which communicates
with the NC during initialization
is checked.1
Cause
Item
The connector (CNlA)
which is linked with the
NC through the bus is
not securely connected.
The cable (CAM11) which
is connected with the NC
through the bus is
defective.
The ground wires of the
NC, amplifier, and motor
are not correctly con-
nected.
The signal cable is not
correclty shielded.
The printed circuit
board SF-TL card is
defective_
The NC side printed
circuit board ~~611 or
MC632 is defective.
6
Check
connector.
the connector are not loosen.
(See Appendixes l-6 to l-9
and 2-3.)
one and check that the equip-
ment correctly works.
(See Appendix 3(2).)
Visually check that the
ground wires are correctly
connected by referencing
Appendix 1.
signal cable is correctly
shielded by referencing
Appendix 1.
a new one and check that the
equipment correctly works.
(See Appendix 6(3)1
Replace the MC611 or MC632
cards with new ones and check
that the equipment correctly
work.
(See "M300 Series Maintenance
Manual".)
Remedy
tor and tighten the screws.
new one.
ground wires.
cable.
a new one.
(See Section 2.4.3.)
cards with the new ones.
MC632: M310
MC611: All other