Mitsubishi Electric MELSEC iQ-R Series User Manual page 70

Section 5 BUFFER MEMORY
5.2.12 Period of measured data acquisition clock (Un\G60, 61)
Set a data update period.
Period of measured data acquisition clock (Xn8) is the data update period.
If period of measured data acquisition clock is 10ms, measured data acquisition clock (Xn8) operates at a
cycle of 10ms.
* For Measured data acquisition clock (Xn8), refer to "4.2.1(8)".
(1) Setting procedure
(a) Set period of measured data acquisition clock (Un\G60, 61) in the buffer memory.
・Setting range: 10 to 10000 (ms)
・Can be set in 10ms increments. (If a value that is not divisible by 10 is set, the first digit is rounded up.)
<Example> When the period of measured data acquisition clock is 123 ms:
Period of measured data acquisition clock = 123 ms / 10 ms = quotient 12 + remainder 3 ms
Thus, because it is not divisible by 10, the first digit is rounded up and 130 is set.
(b) Turn Operating condition setting request (Yn9) from OFF to ON to enable the setting.
(Refer to "4.2.2(5)".)
(2) Precautions for setting
The scan time should be less than OFF time of the measured data acquisition clock (Xn8) in order to detect
"OFF → ON" of the measured data acquisition clock.
Since the OFF time varies according to the period of measured data acquisition clock, pay attention to set
the scan time of ladder program as below.
Period of measured data
acquisition clock
10ms
20ms to10000ms
Refer to "" for details.
(3) Default value
It is set to "10ms".
Scan time of ladder program
Less than 2ms
2/5 of the period of measured data acquisition clock
69
RE81WH