Mitsubishi MELSEC iQ-F, User Manual

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138
APPX
Appendix 4 Buffer Memory Areas
CH1 Minimum value
The minimum value of the digital operation value is stored in 16-bit signed binary value.
In the following cases, 'CH1 Minimum value' (Un\G406) is updated with the current value.
• When 'Operating condition setting request' (Un\G70, b9) is turned off
→ on → off, and the setting is changed
• When 'CH1 Minimum value reset request' (Un/G474) is turned off → on → off
■
Buffer memory address
The following shows the buffer memory address of this area.
■
Refreshing cycle
The value is updated every conversion cycle.
• For the channel to which the averaging processing is specified, the maximum and minimum values are
stored at every averaging processing time.
• When the scaling function, shift function, and digital clipping function are used, values calculated by each
function are stored in Maximum value and Minimum value.
CH1 Logging hold flag
The logging holding status can be checked.
For details on the logging function, refer to the following.
 Page 59 Logging Function
As data collection in 'CH1 Logging data' (Un\G10000 to Un\G19999) comes to a halt, this flag turns to ON (1).
When logging restarts by changing 'CH1 Logging hold request' (Un\G471) from ON (1)
→
OFF (0), 'CH1 Logging hold flag'
(Un\G409) is turned to OFF (0).
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Buffer memory address
The following shows the buffer memory address of this area.
(1) Data section
(2) Sign bit 0: Positive, 1: Negative
Buffer memory name CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
CH  Minimum value 406 606 806 1006 1206 1406 1606 1806
CH  Minimum value (In FX2N allocation function mode) 101 102 103 104 105 106 107 108
Monitor value Description
0 OFF
1 ON
Buffer memory name CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
CH  Logging hold flag 409 609 809 1009 1209 1409 1609 1809
CH  Logging hold flag (in FX2N allocation mode function) 9021 9022 9023 9024 9025 9026 9027 9028
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b0 b1 b2 b3 b4
(1) (2)