Mitsubishi Electric MELSEC Q Series User Manual page 75

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 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) Perform the offset/gain settings separately for each channel. If channels are
set in buffer memory address 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 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 E
power-off.
(5) At the time of offset/gain setting, turn on User range writing request (YA) to
write the values to the E
Data can be written to the E
To prevent unnecessary write to the E
occurs when values 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 Q62DA-FG. ( 1
(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 (buffer memory address 158, 159:
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 (buffer memory address 158, 159: Un\G158,
Un\G159). To resume D/A conversion, switch the mode to the normal mode if
it is set to the offset/gain setting mode, and then turn on and off Operating
condition setting request (Y9).
(9) Buffer memory address 200 (Un\G200), 202 to 217 (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.
2 PROM.
PROM up to 100 thousand times.
2
2 PROM, an error (Error code: 162)
1
) occurs during offset/gain setting, re-set the
indicates the corresponding channel number.)
MELSEC-Q
PROM and are not erased at
2
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