Mitsubishi Electric Q62DAN - 7.5 Precautions for Online Module Change

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MELSEC-Q
7 ONLINE MODULE CHANGE
(2) Reference table for User range settings offset/gain values (buffer memory address
218 to 233: Un\G218 to 233)
Example: When the offset value and gain value of channel 1 are 1V and 5V
respectively, in the Q68DAV, the reference value of CH1 User range
settings offset value (buffer memory address 218: Un\G218) is approx.
8CB4
H and that of CH1 User range settings gain value (buffer memory
address 220: Un\G220) is approx. BFAE
H.
Offset/gain value Reference value (Hexadecimal)
Voltage
0V Approx. 7FF8
H
1V Approx. 8CB4H
5V Approx. BFAEH
10V Approx. FF5AH
Current
0mA Approx. 7FF8
H
4mA Approx. 983AH
20mA Approx. F92EH
7.5 Precautions for Online Module Change
The following are the precautions for online module change.
(1) Always perform an online module change in the correct procedure. A failure to do
so can cause a malfunction or failure.
(2) If an online module change is made with the user range setting, the accuracy after
that will fall to about less than three times of the accuracy before that.
Re-set the offset/gain values as necessary.
(3) Do not perform online module change in the offset/gain setting mode. (If
performed, the D/A converter module may not operate properly.)
(4) Never perform the following operations (a) and (b) during online module change.
(If performed, the D/A converter module may not operate properly.)
(a) Turn off the programmable controller CPU.
(b) Reset the programmable controller CPU.