5 - 118 
MELSEC-Q
 
5   DATA USED FOR POSITIONING CONTROL 
 
Storage item  Storage details  Reading the monitor value 
 
Md.14
 
Axis in which 
the warning 
occurred 
Stores a number (Axis No.) 
that indicates the axis that 
encountered a warning. 
 
Monitoring is carried out with a decimal display. 
Monitor
alue
Storage value
1: Axis 1
2: Axis 2
3: Axis 3
4: Axis 4
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Md.15
 
Axis warning 
No. 
Stores an axis warning No. 
 
Monitoring is carried out with a decimal display. 
Monitor
value
 
Warning No.
For details of warning Nos. 
(warning codes), refer to
 "15.3 List of warnings".
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Md.16
 
Axis warning 
occurrence  
(Hour) 
Stores the time at which an 
axis warning was detected. 
 
Monitoring is carried out with a hexadecimal display. 
0
b15 b12
000000000010101
b8 b4 b0
0150
Buffer memory (stored with BCD code)
 
0 to 2
 
0 to 3
00 to 23 (hour)
 
Monitor value
 
0
015
Not used
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Md.17
 
Axis warning 
occurrence  
(Minute: 
second) 
Stores the time at which an 
axis warning was detected. 
 
Monitoring is carried out with a hexadecimal display. 
0
b15 b12
100100 100 000111
b8 b4 b0
9074
Buffer memory (stored with BCD code)
 
0 to 5 0 to 9
00 to 59 (minute)
 
00 to 59 (second)
0 to 9
Monitor value
 
940
7
0 to 5
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Warning history (Up to 16 records can be stored) 
Md.18
 
Warning 
history pointer 
Indicates a pointer No. that 
is next to the Pointer No. 
assigned to the latest of the 
existing records. 
 
Monitoring is carried out with a decimal display. 
Monitor value
 
Storage value
(Pointer number)
0 to 15
 
 
 
 
 
 
 
 
 
 
 
Md.19
 
No. of write 
accesses to flash 
ROM 
Stores the number of write 
accesses to the flash ROM 
after the power is switched 
ON. 
The count is cleared to "0" 
when the number of write 
accesses reach 26 and an 
error reset operation is 
performed. 
 
Monitoring is carried out with a decimal display. 
Monitor value
 
Storage value 
0 to 25