Mitsubishi Electric Q66DA-G User Manual page 72

4
SETUP AND PROCEDURES BEFORE OPERATION
4
- 13 4.6 Offset/Gain Settings
(1) Set the offset/gain values in the range that satisfies the conditions specified in
Section 3.1.2, (1) and (2).
When the setting exceeds this range, the maximum resolution or total
accuracy may not be within the range indicated in the performance
specification.
(2) Set the offset/gain values separately for each channel. If channels are set in
Un\G22 and Un\G23 at the same time, an error will occur and the ERR. LED
will be lit.
(3) After the offset and gain settings are completed, verify that the offset and gain
values have been set correctly under actual usage conditions.
(4) The offset and gain values are stored into the flash memory and are not
erased at power-off.
(5) At the time of offset/gain setting, turn on User range writing request (YA) to
write the values to the flash memory.
Data can be written to the flash memory up to 100 thousand times.
To prevent unnecessary write to the flash memory, an error (Error code: 162)
occurs when data are written 26 times continuously.
(6) If an error (Error code: 40
correct offset/gain value.
The offset/gain value of the channel where the error has occurred is not
written to the Q66DA-G. (*1 indicates the corresponding channel number.)
(7) Module READY (X0) turns from off to on when the offset/gain setting mode
switches to the normal mode by the dedicated instruction (G(P).OFFGAN) or
the setting of Mode switching setting (Un\G158, Un\G159).
Note that initial setting processing will be executed if there is a sequence
program that makes initial setting when Module READY (X0) turns on.
(8) D/A conversion is discontinued if the mode is switched (from the normal mode
to the offset/gain setting mode or from the offset/gain setting mode to the
normal mode) by the dedicated instruction (G(P).OFFGAN) or the setting of
Mode switching setting (Un\G158, Un\G159).
(9) Un\G200, Un\G202 to Un\G217 are the areas used to restore the user range
settings offset/gain values when online module change is made.
Refer to Chapter 7 for details of online module change.
*1
) occurs during offset/gain setting, re-set the