Mitsubishi Electric MELSEC iQ-R Series User Manual page 42

Section 4 I/O SIGNALS TO CPU MODULE
(7) Measured harmonics data acquisition clock (Xn7)
The clock is to acquire measured harmonics data by synchronizing with this module.
If the signal (Xn7) detects switching from OFF to ON, it is possible to obtain measured harmonics data in
synchronization with this module.
(a) Clock operation
After the power is supplied to the CPU module and immediately after the initial computation is performed,
this signal (Xn7) is turned ON and measured harmonics data acquisition clock is started.
If the settings of the phase wire system, primary voltage, primary current, primary voltage of VT, secondary
voltage of VT, primary current of CT and period of measured data acquisition clock are changed, this
signal turns ON immediately after the change of the settings and measured harmonics data acquisition
clock is started.
Below diagram indicates ON time and OFF time of this signal.
(b) Measured items which update data
The measured items to be updated the data in the period of this signal (Xn7) are shown below.
Harmonic voltage
Harmonic current
Voltage harmonic
distortion
Current harmonic
distortion
* The order of harmonic as follows.
RMS: 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 19th
Distortion: 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 19th
T
1 sec
Measured items
1-2 harmonic voltage (n th)
1-2 harmonic voltage (Total)
2-3 harmonic voltage (n th)
2-3 harmonic voltage (Total)
Phase 1 harmonic current (n th)
Phase 1 harmonic current (Total)
Phase 3 harmonic current (n th)
Phase 3 harmonic current (Total)
1-2 voltage harmonic distortion (n th)
1-2 voltage harmonic distortion (Total)
2-3 voltage harmonic distortion (n th)
2-3 voltage harmonic distortion (Total)
Phase 1 current harmonic distortion (n th)
Phase 1 current harmonic distortion (Total)
Phase 3 current harmonic distortion (n th)
Phase 3 current harmonic distortion (Total)
T T
ON OFF
500 ms 500 ms
41
RE81WH
Buffer memory
Un\G1002 - Un\G 1021
Un\G1022, 1023
Un\G1030 - Un\G 1049
Un\G1050, 1051
Un\G1202 - Un\G1221
Un\G1222, 1223
Un\G1260 - Un\G1279
Un\G1280, 1281
Un\G1402 - Un\G1410
Un\G1411
Un\G1420 - Un\G1428
Un\G1429
Un\G1602 - Un\G1610
Un\G1611
Un\G1640 - Un\G1648
Un\G1649