5 - 3
MELSEC-Q
5 DATA USED FOR POSITIONING CONTROL
The only valid data assigned to these parameters are the data read at the moment
when a positioning or JOG operation is started. Once the operation h as started, any
modification to the data is ignored.
Exceptionally, however, modifications to the following are valid even when they are
made during a positioning operation: accel eration time 0 to 3, deceleration time 0 to
3, and external start command.
• Acceleration time 0 to 3 and deceleration time 0 to 3:
Positioning data are pre-read and pre-anal yzed. Modifications to the
data four or more steps after the current step ar e valid.
• External command function selection: The v alue at the time of detection is valid.
The data is monitored with the sequence program or peripheral device. In this chapter,
the method using the peripheral device will be explained.
Monitor data (Data that indicates the control state. Stored in the buffer memory, and monitors as necessary.)
System monitor data Monitors the QD75 specifications and the operation history.
Axis monitor data Monitors the data related to the operating axis, such as the current position
and speed.
to
Md.1 Md.48
:
to
)
Md.1 )
Md.19
to
)
Md.20 )
Md.48
Control using the control data is carried out with the sequence program.
Control data (Data for user to control positioning system.)
System control data Performs write/initialization, etc. of the "setting data" in the module.
Axis control data Makes settings r elated to the operation, and controls th e speed change during
operation, and stops/restarts the operation.
to
Cd.1 Cd.42
:
to
)
Cd.1 Cd.2
to
)
Cd.3 )
Cd.40
Cd.41
,
Cd.41
" Deceleration start flag valid" is valid for only the value at the time
when the PLC READY signal [Y0] turns from OFF to ON.
)
Cd.42
,
POINT
(1) The "setting data" is created for each axis .
(2) The "setting data" parameters have determined default va lues, and are set to
the default values before shipment from the fact ory. (Parameters related to
axes that are not used are left at the default value.)
(3) The "setting data" can be initialized with GX Configurator-QP or the sequence
program.
(4) It is recommended to set the "setting data" wi th GX Configurator-QP. When
executed with the sequence program, many sequ ence programs and devices
must be used. This will not only complicate t he program, but will also increase
the scan time.