Appendix - 59
MELSEC-Q
APPENDICES
Trouble type
Questions/Trouble
Remedy
No.
Error compensation
The machine only moves to
"10081230", although positioning
with a command value of
"10081234" carried out.
How can the error be
compensated?
The following values are currently
set.
•
"
Pr.2
No. of pulses per
rotation
"
8192PLS
•
"
Pr.3
Movement amount
per rotation" 8000
µ
m
Reset
Pr.3
and
Pr.2
in the following order.
1) Calculate "8192/8000
×
10081234/10081230".
2) Obtain the reduced value.
3) Set the numerator in "
Pr.3
Movement amount per
rotation", and the denominator in "
Pr.2
No. of pulses
per rotation".
18
When carrying out a count-method
machine OPR, the message
"Leave Sufficient Distance From
The OP Position To The Near-
Point Dog OFF." appears. Is there
a problem
if the distance is short?
The near-point dog must be set to turn OFF at a position
after the OP is passed.
(When the OPR is started on the near-point dog ON in a
count-method machine OPR, the machine enters a
normal machine OPR operation after returning to the
near-point dog OFF region.)
(If the near-point dog is turned OFF before the OP, and
the machine OPR is started between the near-point dog
OFF position and the OP, the machine will mistakenly
interpret that its current position is before the near-point
dog ON position, and it will pass over the OP and
continue moving.)
19
In the near-point dog method
machine OPR, the stop positions
are not uniform.
Carry out the following measures.
1) Separate the near-point dog signal and zero signal
detection positions.
2) Lower the values in
"
Pr.46
OPR speed
"
and
"
Pr.47
Creep speed
"
.
3) Confirm whether the zero signal and near-point dog
signal turn ON normally.
4) Check that there is no play (backlash) in the machine
system.
20
Can the machine OPR be carried
out with the OPR retry function
when it is started with the near-
point dog ON and the upper/lower
limit OFF?
A "Hardware stroke limit error" will occur and the
operation will not be carried out.
(The machine will interpret any position where the near-
point dog is ON as being within the working range, and
that the upper/lower limit is ON.)
21
Are ABS and INC positioning
possible without carrying out an
OPR?
They are possible.
In this case, the position where the power is turned ON is
handled as the current feed value "0".
22
OPR
After an OPR, the OPR request
flag sometimes turns ON for no
apparent reason.
The OPR request flag turns ON in the following cases.
1) When the power is turned ON.
2) When the absolute system has not been set.
3) When the OPR has not been executed at the absolute
position system.
4) When an OPR operation starts.
If no problem is found when the above are checked, then
it is possible that the communication is being interrupted
by "a fault in the bus cable", "noise influence", etc.
23
Summary of Contents for MELSEC-Q QD75M
Page 1: ...MELSEC Q QD75M Positioning Module User s Manual Details QD75M1 QD75M2 QD75M4 ...
Page 17: ...MEMO ...
Page 64: ...3 11 MELSEC Q 3 SPECIFICATIONS AND FUNCTIONS MEMO ...
Page 91: ...4 16 MELSEC Q 4 INSTALLATION WIRING AND MAINTENANCE OF THE PRODUCT MEMO ...
Page 108: ...5 17 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 112: ...5 21 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 116: ...5 25 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 138: ...5 47 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 182: ...5 91 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 188: ...5 97 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 194: ...5 103 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 253: ...5 162 MELSEC Q 5 DATA USED FOR POSITIONING CONTROL MEMO ...
Page 274: ...6 21 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 275: ...6 22 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 276: ...6 23 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 277: ...6 24 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 278: ...6 25 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 279: ...6 26 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 280: ...6 27 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 281: ...6 28 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 282: ...6 29 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 283: ...6 30 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 284: ...6 31 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 285: ...6 32 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 286: ...6 33 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 287: ...6 34 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 288: ...6 35 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 289: ...6 36 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 290: ...6 37 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 291: ...6 38 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 292: ...6 39 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 293: ...6 40 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 294: ...6 41 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 295: ...6 42 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 296: ...6 43 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 297: ...6 44 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 298: ...6 45 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 299: ...6 46 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 300: ...6 47 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 301: ...6 48 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 302: ...6 49 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 303: ...6 50 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 304: ...6 51 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 305: ...6 52 MELSEC Q 6 PLC PROGRAM USED FOR POSITIONING CONTROL ...
Page 332: ...7 7 MELSEC Q 7 MEMORY CONFIGURATION AND DATA PROCESS MEMO ...
Page 336: ...7 11 MELSEC Q 7 MEMORY CONFIGURATION AND DATA PROCESS MEMO ...
Page 347: ...MEMO ...
Page 477: ...9 116 MELSEC Q 9 MAJOR POSITIONING CONTROL MEMO ...
Page 539: ...11 36 MELSEC Q 11 MANUAL CONTROL MEMO ...
Page 663: ...14 18 MELSEC Q 14 DEDICATED INSTRUCTIONS MEMO ...
Page 771: ...Appendix 2 MELSEC Q APPENDICES MEMO ...
Page 845: ...Appendix 76 MELSEC Q APPENDICES MEMO ...
Page 855: ...Index 10 X X0 QD75 READY 3 15 X1 Synchronization flag 3 15 Z Zero speed Pr 130 5 74 ...