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MELSEC-Q
7 ONLINE MODULE CHANGE
(2) Reference table for user range settings offset/gain values (buffermemory addresses 218 to 233: Un\G218 to 233)
Example: When the offset value and gain val ue of channel 1 are 1V and 5V,
respectively, in the Q68ADV, the reference value of the CH1 user
range settings offset value (buffer memor y address 218: Un\G218) is
approx. 8C46H and that of the CH1 user range settings gain value
(buffer memory address 220: Un\G220) is appr ox. BD64H.
Offset/gain value Reference value (Hexadecimal)
0V Approx. 800CH
1V Approx. 8C46H
5V Approx. BD38H
Voltage
10V Approx. FA64H
0mA Approx. 800CH
4mA Approx. 8C46H
Current
20mA Approx. FA64H
7.5 Precautions for Online Module Change
The following are the precautions for online modu le 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 us er 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.