Mitsubishi Electric Q12DCCPU-V User Manual page 227

6
PREPARATORY PROCEDURES AND SETTING
* 1 Program the system so that the following operation will be performed at start-up of the C Controller
module.
1) When a battery voltage drop is detected, Ym is turned on.
In the program, Ym must be turned on by the QBF_Y_Out_BitEx function when "Built-in battery
error status" of the QBF_ReadStatusEx function is set to 1 (battery error).
2) Yn is turned on at start of the user program.
In the program, Yn must be turned on to release the interlock at start of the user program of the
C Controller module.
3) After XM turns on and the DC input signal is established, system processing is started.
Create a program so that system processing will start when the DC input signal establishment
time has elapsed after turn-on of XM (the status can be confirmed by the QBF_X_In_BitEx
function).
(The DC input signal establishment time is the time taken from "on" of RA2 to 100%
establishment of the DC input signal. Set this time to 0.5 seconds.)
However, when a voltage relay is used for RA2, the DC input signal establishment time need not
be set in the user program.
6.2 Fail-Safe Circuit
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