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MELSEC-A
5 DATA USED FOR POSITIONING CONTROL
Storage item Storage details Reading the monitor value
Md.7
Start axis
The No. of the axis that started is
stored.
Monitoring is carried out with a decimal.
Storage value
1: Axis 1
2: Axis 2
3: Axis 3
Monitor
value
[Stored contents]
The operation information (restart flag, start origin, operation type) is stored.
•
Restart flag : Whether the operation restarted after stopping once
•
Start origin : Where the start signal was input from
•
Operation type : What type of operation was carried out
Md.8
Operation type
[Reading the monitor value]
Monitoring is carried out with a hexadecimal.
b15 b12 b8 b4 b0
ABCD
BaCD
D
C
B
A
Buffer
memory
Monitor value
Start origin
Restart flag
Operation type
00
01
10
Stored contents Storage value
PLC CPU
External signal
Peripheral device
0
1
Stored contents Storage value
Restart flag OFF
Restart flag ON
a : Binary, B to D: Hexadecimal
a
0
B
0
C
0
D
1
001
1
F
7
C
0
2
5
8
8060
1
F
7
D
8061
1
F
7
3
8051
1
F
7
4
8052
1
F
7
5
8053
600
Stored contents
Storage value
Remarks
(decimal)
Positioning operation
JOG operation
Manual pulse generator operation
Machine zero point return
High-speed zero point return
Current value change
~
1
B
5
8
1
B
6
2
7010
Block positioning operation
~
7000
Md.9
Start time
(Hour: minute)
The starting time is stored.
(Software clock data created by
system in AD75.)
Monitoring is carried out with a hexadecimal.
0
b15 b12
00 1010100110000
b8 b4 b0
5301
0 to 2
0 to 3 0 to 5
00 to 23
00 to 59
0 to 9
5
130
Buffer memory (stored with BCD code)
Monitor value
(hour) (minute)
Md.10
Start time
(Second:100 ms)
The starting time is stored.
(Software clock data created by
system in AD75.)
Monitoring is carried out with a hexadecimal.
0
b15 b12
100100100000111
b8 b4 b0
90
7
4
0 to 5
0 to 9
0
00 to 59 00 to 09
0 to 9
940
7
Buffer memory (stored with BCD code)
Monitor value
(second) (100 ms)
[Stored contents]
The error judgment results when starting (shown below) are stored.
•
BUSY start warning flag
•
Error flag
•
Error No.
Md.11
Error judgment
[Reading the monitor value]
Monitoring is carried out with a hexadecimal.
b15 b12 b8 b4 b0
ABCD
B
aC
D
D
C
B
A
0
1
0
1
a, B, C and D are converted into a decimal,
which can be confirmed in section "14.2 List of errors".
Buffer
memory
Monitor value
Error flag
BUSY start warning
Error No.
Stored contents Storage value
Stored contents Storage value
Error flag OFF
Error flag ON
BUSY start
warning OFF
BUSY start
warning ON
Starting history (up to 16 items can be stored)
Md.12
Starting history
pointer
The pointer No. following the
pointer No. where the latest start
history is stored is indicated.
Monitoring is carried out with a decimal.
Storage value (Pointer No.)
0 to 15
Monitor
value
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