Mark Detection Function (Current Position Latch) - Mitsubishi Electric MELSERVO-J4 Instruction Manual
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10. COMMUNICATION FUNCTION
10.2.7 Mark detection function (current position latch)
Turning on the mark detection signal triggers latching current position. The latched data can be read with
communication commands.
(1) Communication command
Reads mark detection data.
Command
Data No.
[1] [A]
[0] [0]
[0] [1]
[0] [2]
[0] [3]
(2) Reading data
(a) Rising latch data or falling latch data (data part)
Reads MSD (Mark detection) rising latch data or MSD (Mark detection) falling latch data.
1) Transmission
Transmits the command [1] [A] + the data No. [0] [0], [0] [1] corresponding to the point tables to
read. Refer to section 10.1.1.
2) Return
The slave station returns the position data of point table requested.
POINT
The read latch position data is not compatible with the current position of status
monitor when the roll feed display function is enabled. When comparing the
latch position data with current position of status monitor, disable the roll feed
display function.
MSD (Mark detection) rising latch data (data part)
MSD (Mark detection) falling latch data (data part)
MSD (Mark detection) rising latch data (data part + additional information)
MSD (Mark detection) falling latch data (data part + additional information)
Data will be received in hexadecimal per set command.
Hexadecimal should be changed to decimal.
Example
Data "000186A0" will be 100.000 mm in the command-side unit.
A decimal point position depends on setting contents of [Pr. PT01] and [Pr. PT03].
Description
10 - 32
Control
mode
Frame
length
C
C
P
P
L
S
8
12
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