Mitsubishi MELSEC Q Series User Manual page 115

4 SETUP AND PROCEDURES BEFORE OPERATION
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POINT
(1) Perform the offset/gain settings in the range that satisfies the conditions
specified in POINT of Section 3.1.2 (2).
If the setting exceeds the range, the resolution or accuracy may not fall within
the range indicated in the performance specification.
(2) Though the offset/gain settings can be performed on multiple channels at the
same time, set the offset and gain separately (0 at either of the buffer memory
addresses 22, 23).
If channels are set at the buffer memory addresses 22 (Un\G22) and 23
(Un\G23) at the same time, an error will occur and the ERR. LED will be lit.
(3) After the offset/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 E
power-off.
(5) In configuring the offset/gain setting, turning ON the user range write request
(YA) enables the data to be written in the E
Data can be written to the E
Writing data 26 times in a row causes an error (error code: 162), which is
intended to protect the E
(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 A/D converter module. ( 1:
number.)
(7) When the offset/gain setting mode is switched to the normal mode, the module
ready (X0) turns from OFF to ON.
Note that the initial setting processing will be executed at this time if there is a
sequence program that performs initial settings when the module ready (X0)
turns ON.
(8) When one mode is switched to the other (the normal mode is switched to the
offset/gain setting mode or the offset/gain setting mode is switched to the
normal mode), A/D conversion is suspended and power supply to the 2-wire
transmitter is turned OFF.
To resume A/D conversion and power supply to the 2-wire transmitter, turn ON
the operating condition setting request (Y9) after the mode is switched to the
normal mode.
(9) Buffer memory addresses 202 to 225 (Un\G202 to Un\G225) 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.
2
PROM.
2
PROM up to 100 thousand times.
2
PROM from inadvertent write.
1
) occurs during offset/gain setting, re-set the
indicates the corresponding channel
MELSEC-Q
2
PROM and are not erased at
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