Item
Description
Function description
1) By turning ON FB_EN (Execution command), settings of each function are enabled.
2) The buffer memory is updated by executing the DA conversion enable/disable setting
FB/DA output enable/disable setting FB. The set data, however, is not enabled. Execute
this FB to enable the settings.
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 turns ON/OFF the operating condition setting request signal. Please note that
the DA conversion is stopped during operation of this FB.
6) This FB uses index register Z9. Please do not use this index register in an interrupt
program.
7) Every input must be provided with a value for proper FB operation.
8) 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.
9) 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".
Timing chart
FB_EN (Execution command)
FB_ENO (Execution status)
FB_OK
(Completed without error)
FB_ERROR (Error flag)
ERROR_ID(Error code)
0
Operating condition setting
request (Y signal)
Operating condition setting
completed flag (X signal)
MELSEC-Q Digital-Analog Converter Module FB Library Reference Manual
FBM-M042-B
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