Mitsubishi FREQROL-SF Troubleshooting Manual page 40

[This alarm occurs when the system clock
which is sent from the NC is defective.]
[The parity of the data whick is trans-
mitted from the NC is checked.]
[This alarm occurs when the position refer-
ence of the synchronous tap which is
transmitted from the NC is too large.]
[This alarm occurs when data from the NC
is not completed.]
Item Cause
The connector (CNlA)
which is linked with the
1
NC through the bus is
loosed.
The cable (CAM111 which
is linked with the NC
2
through the bus is
defective.
The NC, amplifier, and
3
motor are not correctly
grounded.
The signal cable is not
correctly shielded.
4
The termination resistor o Check that the termination
of the bus connection is
abnormal.
5
The bus interface cir-
6
defective.
External Clock Error
alarm No.l5(ME2), check the
connector.
alarm No.lS(ME21, check the
connector.
alarm No.l5(ME2), check the
grounding.
alarm No.lS(ME21, check the
shielding of the signal
cable.
resistor is correctly
installed.
(See Appendixes 1-6 to l-9.)
resistor with a new one and
check that the equipment
correctly works.
new one and check that the
equipment correctly works.
Check
Remedy
mounting screws.
new one.
cable.
resistor.
(See Appendix 3t21.1
board SF-TL card with a
new one.
(See Section 2.4.3.)
o n