Mitsubishi MELSEC-L Series User Manual page 137

● Configure the offset/gain setting in accordance with the actual use situation.
● Offset and gain values are recorded in the flash memory in the A/D converter module by turning OFF → ON → OFF User
range write request (YA). Once recorded, the values are not deleted even after turning the power off.
When the values are written 26 times in succession, an error occurs and the error code is stored in Latest error code
(Un\G19) to prevent an improper write to flash memory.
● Configure the offset/gain setting in the range satisfying the following condition.
When the setting value out of the range is configured, the resolution and accuracy of the module may not fall within the
range shown in the following performance specifications.
• I/O conversion characteristic of A/D conversion (
● Offset/gain setting can be configured for multiple channels at the same time, however, the setting must be configured for
offset and gain channels separately.
When configuring the setting for offset and gain channels at the same time, an error occurs and ERR. LED turns on.
● When turning ON User range write request (YA), the integrity between the offset values and gain values is checked.
When error occurs even in one channel, offset/gain value is not written to the module.
Check the value in Latest error code (Un\G19) and perform the following procedures to reconfigure the offset/gain setting
from the beginning.
• Error code list (
● When the mode is switched from the offset/gain setting mode to the normal mode by the setting of the dedicated
instruction (G(P).OFFGAN) or Mode switching setting (Un\G158, Un\G159), Module READY (X0) turns from OFF to ON.
Note the initial setting process is executed at the switching of the mode if the sequence program executes the initial
setting at Module READY (X0) ON.
● To validate the intelligent function module switch setting after writing the setting to the CPU module, reset the CPU
module or turn the power supply from OFF to ON.
(4) Program example
(a) Device
Ex. I/O number of the A/D converter module is X/Y30 to 3F (when the L26CPU-BT is used).
The following shows the devices used in the program example.
Device
M0
M1
M2
M3
M4
M5
D0
D1
When using the L02CPU, set the I/O assignments of the A/D converter module to X/Y30 to 3F so that the I/O assignments
be the same as that of the system configuration above.
Page 89, Section 11.4)
Channel selection
Offset setting
Gain setting
Channel change command
Write command to module of offset/gain setting value
Mode switching
Channel-specified storage device
Storage device for the setting value of the dedicated instruction (G(P).OFFGAN)
Page 114, Appendix 3)
Functions
APPENDICES
APPEN
DIX
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