Mitsubishi Electric MELSERVO MR-J2S- A Instruction Manual page 367

15. ABSOLUTE POSITION DETECTION SYSTEM
(4) Differences between A1SD75 and A1SD71
The sequence programs shown in (2) of this section differ from those for the A1SD71 in the following
portions. 1) to 20) in the following sentences indicate the numbers in the programs given in (2) of this
section.
(a) Devices used
Since the A1SD75 is a one-slot module which occupies 32 I/O points, the I/O devices are different,
as indicated by 1) and 2), from those of the two-slot A1SD71 which occupies 48 point. The A1SD75
uses the devices indicated in the following table, and its D registers and M contacts are different as
indicated by 3) and 4).
Device name
Input
Output
internal relay
Data register
(b) ABS sequence program example
1) Initial setting
To reset the error of the A1SD75, the program 5) is added to reset all output signals at start-up.
The axis error reset buffer memory address is changed from 201 to 1154 (axis 1) and the slot
number from H0001 (slot number 1) to H0000 (slot number 2) 6).
2) Absolute position polarity, A1SD75 rotation direction setting detection
The slot number and buffer memory of the X-axis rotation direction parameter reading area are
changed from [FROMP H0001 K7872 D8 K1] to [FROMP H0000 K5 D8 K1] 8).
The rotation direction parameter masking area is changed from [WAND H0004 D8] to [WAND
H0001 D8] 9).
3) Reversing absolute position polarity
The rotation direction judging area is changed from [= D8 K4] to [= D8 K1] 10).
4) Reading checksum 6 bits, reading ABS data 32 bits
The 4 bits reading area is changed from [MOV K1 X30D5] to [MOV K1X20 D5] 11).
5) Restoring absolute position data
The slot number and buffer address of the A1SD75 home position address reading area are
changed from [DFROP H0001 K7912 D9 K1] to [DFROP H0000 K72 D9 K1] 12)
Devices
Axis 1 Axis 2 Axis 3
X0 A1SD75 ready
X4 X5 X6 BUSY
XA XB XC Error detection
Y10 Y11 Y12 Positioning start
Y13 Y14 Y1C Axis stop
Y16 Y18 Y1A Forward rotation jog start
Y17 Y19 Y1B Reverse rotation jog start
Y1D Programmable controller ready
M0 Parameter setting completion flag
Flash ROM registration processing
M1
flag
M2 M3 M4 Axis error reset requesting flag
M100 A1SD75 normal flag
M101 Initial error reset completion flag
M102 All BUSY signal OFF flag
M103 A1SD75 operable flag
D100 Flash ROM registration results
D101 D102 D103 Axis error code
D104 D105 D106 Axis warning code
D107 D108 D109 Axis error reset results
Application
15 - 60
Bit device :Data at ON
Data register :Stored data
Not ready/ WDT error
BUSY(running)
Error detection
Start being requested
Stop being requested
Forward rotation being started
Reverse rotation being started
Programmable controller CPU
normal
Setting complete
Processing
Requesting
A1SD75 normal
Error reset complete
All BUSY signal OFF
Operable
Registration results
Error code
Warning code
Axis error reset results