Details Of I/O Signals - Mitsubishi Electric QE82LG User Manual

5 I/O signal to CPU unit

5.2 Details of I/O signals

Detailed explanation about I/O signals of QE82LG is provided as follows:
5.2.1 Input signals
(1) Module ready (Xn0)
(a) When the power of CPU module is turned on or the CPU module reset is performed, it will
turn ON as soon as the measurement is ready.
(b) Module ready is turned OFF when the insulation monitoring module displays a hardware
error, and RUN LED is turned off.
(2) Io1 primary alarm flag (Xn1)
(a) When the present value Io1 exceeds Io1 primary alarm value (Un\G1000) and the
situation continues for Io1 primary alarm delay time (Un\G1002), this signal (Xn1) turns
ON.
(b) Operations after this signal (Xn1) is turned ON will be different depending on the setting of
Io1 primary alarm reset method (Un\G1001) below.
[When Io1 primary alarm reset method (Un\G1001) is "self-retention"]
Even if the present value Io1 goes under Io1 primary alarm value (Un\G1000), this signal
(Xn1) remains ON. Then, when CH1 alarm reset request (Yn1) is turned to ON, this signal
(Xn1) turns OFF.
[When Io1 primary alarm reset method (Un\G1001) is "auto reset"]
If the present value Io1 goes under Io1 primary alarm value (Un\G1000), this signal (Xn1)
turns OFF.
(c) When Io1 primary alarm value (Un\G1000) is set to "0 (not monitoring)", this signal (Xn1)
is always OFF.
*For the actual behavior of alarm monitoring, refer to 4.2.4.
(3) Io1 secondary alarm flag (Xn2)
The usage procedure is the same as Io1 primary alarm flag (Xn1). Refer to (2).
(4) Ior1 primary alarm flag (Xn3)
The usage procedure is the same as Io1 primary alarm flag (Xn1). Refer to (2).
(5) Ior1 secondary alarm flag (Xn4)
The usage procedure is the same as Io1 primary alarm flag (Xn1). Refer to (2).
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