MITSUBISHI ELECTRIC Mitsubishi Programmable Logic Controller QD75D - Manual (Page 690)

Appendix - 48
MELSEC-Q
APPENDICES
Functions deleted from those of A1SD75P1-S3/A1SD75P2-S3/A1SD75P3-S3
Deleted functions Remarks
Stepping motor mode –
OPR operation error (Error code: 208) –
Fast machine OPR –
Special start (stop) –
Indirect designation
In the QD75, the start block area on the buffer memory is
expanded to five blocks (0 to 4). Each start block can be directly
designated with positioning start No. (7000 to 7004).
Block transfer
Positioning data I/F
With the A1SD75, this interface is used to set positioning data
Nos. 101 to 600 that do not exist on the buffer memory.
Since all positioning data can be set in the buffer memory with the
QD75, this function is deleted.
Start history storage during error
The contents are the same as those of the start history. Therefore,
the QD75 stores only the start history.
System monitor data (module type, OS information)
These data were deleted because they can be displayed in system
monitor "Module's detailed information" of GX Developer.
(Refer to GX Developer Operating Manual.)
Functions changed from those of A1SD75P1-S3/A1SD75P2-S3/A1SD75P3-S3
Changed functions Descriptions
Software stroke limit function
1. The limit check of arc address is carried out only when a sub
point is designated. It is not carried out when a center point is
designated.
2. The software stroke limit check during speed control is carried
out in the following cases:
• When the software stroke limit is applied to the current feed
value with Pr.14 and the current feed value is updated with
Pr.21 .
• When the software stroke limit is applied to the machine feed
value.
3. If an attempt is made to change the current value but the
designated address is out of the software stroke limit range, the
attempt is considered as an error and the current value is not
changed.
4. The conventional models feature three types of software stroke
limit error codes for upper limit and lower limit respectively. With
the QD75, errors for the software stroke upper limit are
integrated into error code 507, and errors for the lower limit are
integrated into error code 508. Error codes 509 to 512 are
deleted.
Current value changing
M code function
1. An error occurs when the designated new current value is out of
the software stroke limit range.
2. The M code setting value is valid during the positioning data
current value changing instruction.
Acceleration/deceleration control
1. An error occurs when the command frequency value calculated
from the speed limit value is out of the maximum command
frequency of the positioning module being used.
2. Only two-word type (1 to 8388608ms) can be used as the
setting value for the acceleration/deceleration time. (The switch
between 1-word type and 2-word type is eliminated.)