A/D Conversion Completed Flag (Buffer Memory Address 10: Un\G10); Ch Temperature Measurement Value (16Bit) (Buffer Memory Addresses 11 To 14: Un\G11 To 14) - Mitsubishi Electric Q64RD User Manual

3 SPECIFICATIONS

3.4.5 A/D conversion completed flag (buffer memory address 10: Un\G10)

3.4.6 CH temperature measurement value (16bit) (buffer memory addresses 11 to 14:
Un\G11 to 14)
3 - 17
(1) You can check whether the channels specified for conversion enable succeeded
in normal temperature conversion.
(2) You can make check on each channel using the A/D conversion completed flag.
(3) The A/D conversion completed flag is cleared when the Operation Condition
Setting Request (Y9) is turned from ON to OFF.
(4) When disconnection occurs, the A/D conversion completed flag of the
corresponding channel is cleared.
(5) The A/D Conversion Completed Signal (XE) turns on when conversions of all
channels set for conversion enable are completed.
• When conversion enable/disable designation is turned from 1 (disable) to 0 (enable)
After the temperature conversion value is stored into buffer memory, the A/D conversion
completed flag of the corresponding channel is turned to 1.
• When conversion enable/disable designation is turned from 0 (enable) to 1 (disable)
The A/D conversion completed flag of the corresponding channel is turned to 0.
• When disconnection is detected
The A/D conversion completed flag of the corresponding channel is turned to 0.
b15 b14 b13 b12 b11 b10
0 0 0
(1) The "temperature-measuring resistance value" input from the platinum
temperature-measuring resistor is converted into a "temperature value" to detect a
temperature.
(2) The value of the measured temperature to the first decimal place is multiplied by
10 and the result is stored into buffer memory in 16-bit signed binary. (All digits to
the right of the second decimal place is rounded down.)
(3) A negative temperature measurement value is displayed as two's complement.
(4) At power-on or reset, all channels are set to 0.
[Example 1] At the temperature measurement value of 123.025
b15 b14 b13 b12 b11 b10
0 0 0
[Example 2] At the temperature measurement value of -123.025
b15 b14 b13 b12 b11 b10
1 1 1
b9 b8
0 0 0 0 0
b9 b8
0 0 1 0 0
b9 b8
1 1 0 1 1
b7 b6 b5 b4 b3
0 0 0 0 CH.4 CH.3 CH.2 CH.1
1: Conversion completed
0: During conversion or unused
..... 1230 is stored.
b7 b6 b5 b4 b3
1 1 0 0 1
..... -1230 is stored.
b7 b6 b5 b4 b3
0 0 1 1 0
MELSEC-Q
b2 b1 b0
b2 b1 b0
1 1 0
b2 b1 b0
0 1 0
3 - 17