Offset/Gain Settings (Q66Ad-Dg) - Mitsubishi Electric Q68AD-G User Manual

4
SETUP AND PROCEDURES BEFORE OPERATION
(2) Program examples
4.6 Offset/Gain Settings
4
- 16
4.6.1 Offset/gain settings (Q68AD-G)
(1) Perform the offset/gain settings in the range that satisfies the conditions
specified in POINT of Section 3.1.2 (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) 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 Un\G22 and 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 Flash memory and are not
erased at power-off.
(5) At the time of offset/gain setting, turn ON the user range write request (YA) to
write the values to the flash memory.
Data can be written to the flash memory the maximum of 50 thousand times.
To prevent accidental writing to the flash memory, an error (error code: 162)
will occur if data is written 26 times consecutively.
(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(P).OFFGAN) or
the setting of the 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) Un\G200, Un\G202 to Un\G233 are the areas used to restore the User-set
offset/gain values when online module change is made.
Refer to Chapter 7 for details of online module change.
The program in the dotted area of (a) is common to (a), (b) and (c).
Is this example, the I/O signals for the Q68AD-G 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(P).OFFGAN) setting storage device . . D1
*1
) occurs during offset/gain setting, re-set the
indicates the corresponding channel number.)