Mitsubishi Electric Melsec Q Series User Manual page 274

7
PROGRAMMING
Table7.77 Tracking-Transfer Devices in the Program Example for Time Control over DP-Slaves
Device
X27 Time control execution command
ON for 1 scan only
after switching the system
from standby to control
Figure 7.39 Program Example for Time Control Function (Time Data Write Request)
7
- 85 7.9 Program Examples for Use in the Redundant System
7.9.6 Program example for time control over DP-Slaves
(c) Tracking devices for reexecuting the function in the case of system switching
In the program for the time control over DP-Slaves, data in the following devices
are tracking-transferred.
• Start command device by which the Time control start request signal (Y19) is
turned ON
• Start command device to which time control request data are set
Description
(d) Program example
If system switching occurs with Time control execution command ON,
the time control function may be reexecuted after the system switching.
To prevent reexecution, perform the following while "ON for 1 scan only
after switching the system from standby to control" (SM1518) is ON.
Program for time control over DP-Slaves (
Device
Section 7.6.4
)
Description