Item
Description
Function description
1) By turning ON FB_EN (Execution command), the offset value of the specified channel is
set.
2) To adjust the D/A output, set i_Adjust_Amount (Offset/gain adjustment amount) and turn
OFF i_Value_Change (Setting value change command) and then ON while FB_EN
(Execution command) is ON.
3) When the input value is invalid, the FB_ERROR output turns ON, processing is
interrupted, and the error code is stored in ERROR_ID (Error code).
Refer to the error code explanation section for details.
Compiling method
Macro type
Restrictions and
precautions
1) The FB does not include error recovery processing. Program the error recovery
processing separately in accordance with the required system operation.
2) The FB cannot be used in an interrupt program.
3) Please ensure that the FB_EN signal is capable of being turned OFF by the program. Do
not use this FB in programs that are only executed once such as a subroutine,
FOR-NEXT loop, etc. because it is impossible to turn OFF.
4) When two or more of these FBs are used, precaution must be taken to avoid repetition of
the target channel.
5) This FB uses index registers Z7, Z8 and Z9. Please do not use these index registers in
an interrupt program.
6) Every input must be provided with a value for proper FB operation.
7) When this FB is used in two or more places, a duplicated coil warning may occur during
compile operation due to the Y signal being operated by index modification. However
this is not a problem and the FB will operate without error.
8) The output range, synchronous output mode, resolution mode, and operation mode must
be configured to match devices and systems connected to the Q64DA module.
Configure these settings by making the GX Works2 switch setting according to the
application.
For details on how to use the intelligent function module switch setting, refer to GX
Works2 Operating Manual (Common).
FB operation type
Pulsed execution (multiple scan execution type)
Application example
Refer to "Appendix 1. FB Library Application Examples".
MELSEC-Q Digital-Analog Converter Module FB Library Reference Manual
FBM-M042-B
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