Mitsubishi Electric MELSEC Q Series User Manual page 89

Item
Error occurrence
Md.15
(Minute: Second)
Error history pointer
Md.16
Maximum accumulated
Md.17
pulse value
Minimum accumulated
Md.18
pulse value
Accumulated pulse
error detection function
Md.19
status
Reference value
Md.20
measurement flag
Deviation counter
Md.21
value (pulse)
Movement amount
after near-point dog
Md.22
ON (absolute value)
Description
The time (minute: second) of error detection is stored in BCD code.
• b15 to b8: Minute
• b7 to b0: Second
The data can be monitored in hexadecimal.
1 5
b15
0 0 0 1 0 1 0
0 to 5 0 to 9
Monitor value
1 5 0
00 to 59 (Minute) 00 to 59 (Second)
• The pointer No. for the next error record is stored. A value from 0 to
15 is stored.
• Even when Error reset signal (Y28) is turned on, the data is not
cleared to 0.
[When the accumulated pulse error detection function is being executed]
The reference value that is kept in the flash ROM of the QD73A1 is
displayed.
[When the reference value is being measured]
The maximum/minimum accumulated pulse values are stored when the
positioning is executed in the address increasing/decreasing direction.
[In other cases]
0 is stored.
The status of the accumulated pulse error detection function is
displayed.
0: Normal
1: Accumulated pulse error is being detected
2: Reference value is being measured
The status of the reference value measurement is displayed.
0: Unmeasured
1: Measured
Check that this area stores 1 before writing data in the flash ROM.
This area becomes 0 at the following timing.
• When the module is started
• When " Accumulated pulse error detection request" is set to 1
Cd.18
and the error detection starts
• The difference of the values obtained from "Command pulse ×
CMX/CDV" and "Number of feedback pulses × Multiplication" is stored
as a deviation counter value.
• The update cycle is 0.5ms.
• When OPR starts, "0" is stored.
• When OPR is completed, the movement amount from the near-point
dog ON to the OPR completion is stored as an absolute value.
(Movement amount: Movement amount to OPR completion using
near-point dog ON as "0".)
• The count value is stored for both the near-point dog method and the
count method. (Use the value as a reference value for OPR
adjustment.)
CHAPTER 5 DATA USED FOR POSITIONING
0 8
b8 b7 b0
1 0 0 0 0 1 0 0 0
0 to 5 0 to 9
8
Buffer
memory
Default value
address
(decimal)
Page
0000
88, Section
H
5.5 (1)
0 184
200
0 pulse
201
202
0 pulse
203
0: Normal 204
0: Unmeasured 205
116
0 pulse
117
118
0 pulse
119
87
5