Mitsubishi Q64AD-GH User Manual page 83

4 SETUP AND PROCEDURES BEFORE OPERATION
1 The mode switching (normal mode to offset/gain setting mode to normal mode)
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method is given below.
• Dedicated instruction (G.OFFGAN) ........... Refer to Section 4.6.1 (2), (a)
• Setting made to mode switching setting (buffer memory addresses 158, 159:
Un\G158, Un\G159) and turning the operation condition setting request (Y9) from
OFF to ON ...................................................Refer to Section 4.6.1 (2), (b)
• Intelligent function module switch setting ...Refer to Section 4.5, Section 4.6.1 (2), (c)
(After intelligent function module switch setting, reset the PLC CPU or switch power
OFF, then ON.)
POINT
(1) Perform the offset/gain settings in the range that satisfies the conditions
specified in POINT of Section 3.1.2 (1).
When the setting exceeds this range, the maximum resolution or total accuracy
may not be 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) At the time of offset/gain setting, turn ON the user range write request (YA) to
write the values to the E
Data can be written to the E
To prevent accidental write to the E
code (buffer memory address 19: Un\G19) will be stored if write is performed
26 consecutive times.
(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 module.( 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.OFFGAN) or the
setting of the mode switching setting (buffer memory addresses 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) Buffer memory addresses 200 (Un\G200), 202 to 233 (Un\G202 to Un\G233)
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) Program examples
The program in the dotted area of (a) is common to (a), (b) and (c).
Is this example, the I/O signals for the Q64AD-GH are X/Y0 to X/YF
• Channel selection. .................................................................................M0
• Offset setting..........................................................................................M1
• Gain setting............................................................................................M2
• Channel change command ...................................................................M3
• Offset/gain setting value write command to the module ......................M4
• Mode switching ......................................................................................M5
• Channel designation storage device.....................................................D0
• Dedicated instruction (G.OFFGAN) setting storage device .................D1
2
PROM.
2
PROM up to 100 thousand times.
2
PROM, an error will occur and the error
1
) occurs during offset/gain setting, re-set the
indicates the corresponding channel number.)
MELSEC-Q
2
PROM and are not erased at
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