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MELSEC-
A
6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL
6.6 Program details
6.6.1 Initialization program
(1) Zero point return request OFF program
This program forcibly turns OFF the "zero point return request flag" (RX(n+1)F,
RX(n+4)F) which is ON.
When using a system that does not require zero point return, assemble the
program to cancel the "zero point return request" made by the D75P2 when the
power is turned ON, etc.
Data requiring setting
Set the following data to use the zero point return flag OFF request.
Setting item
Setting
value
Setting details
Remote input/output
Axis 1 Axis 2
Zero point return request
flag OFF request
ON
Set to "ON: Turn zero point return request flag
OFF".
RY(n+2)A RY(n+4)A
* Refer to section "3.4 Specifications of input/output signals for master module" for details on the setting details.
Time chart for zero point return OFF request
Remote station READY signal
D75P2 READY signal
OFF
ON
ON
Zero point return request flag
Zero point return request flag OFF request
OFF
OFF
[RX(n+7)B]
[RXn0]
OFF
ON
[RX(n+1)F, RX(n+4)F]
[RY(n+2)A, RY(n+4)A]
ON
Fig. 6.1 Time chart for zero point return OFF request
(2) External start function valid setting program
This program is used to validate the "external signal" beforehand when using the
external start function (external start, speed change, skip). (Set which function to
use beforehand in "
Pr.43
External start function selection".)
Set the following data to validate the "external signal".
Setting item
Setting
value
Setting details
Remote input/output
Axis 1 Axis 2
External start valid ON Set to "ON: Validate external start". RY(n+2)B RY(n+4)B
* Refer to section "3.4 Specifications of input/output signals for master module" for details on the setting details.