Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 299

■Module READY (b0)
'Module READY' (Un\G69, b0) turns on to indicate the preparation for the D/A conversion is completed after the power-on or
the reset operation of the CPU module.
In the following cases, 'Module READY' turns off.
• In the offset/gain setting mode (In this case, the D/A conversion is performed.)
• When a watchdog timer error occurs in the analog output module (In this case, the D/A conversion is not performed.)
■Offset/gain initialization completed flag (b5)
• Use as an interlock condition to turn on and off 'Offset/gain initialization request' (Un\G70, b5).
• After the offset/gain initialization is executed, the offset/gain initialization completed flag turns on from off.
• Offset/gain initialization is not be performed unless 'Offset/gain initialization enabled code' (Un\G305) is set to E20FH.
• It is possible to perform offset/gain initialization in normal output mode only.
• When 'Offset/gain initialization request' (Un\G70, b5) is off, 'Offset/gain initialization complete flag' (Un\G69, b5) turns off.
Offset/gain setting offset value
Offset/gain setting gain value
'Offset/gain initialization completed flag'
(Un\G69, b5)
'Offset/gain initialization request'
(Un\G70, b5)
■External power supply READY flag (b7)
• When the external power supply is off
'External power supply READY flag' (Un\G69, b7) remains off and D/A conversion processing is not performed. In this case,
the analog output value is 0 V/0 mA.
• When the external power supply is turned off and on
When the external power supply turns on, 'External power supply READY flag' (Un\G69, b7) turns on. The D/A conversion is
started on the channels where the D/A conversion is enabled.
CPU module power supply
In normal mode:
Module READY (Un\G69, b0)
In offset/gain setting mode:
Offset/gain setting mode
status flag (Un\G69, b10)
External power supply of
analog output module
External power supply
READY flag (Un\G69, b7)
• When the external power supply is turned on and off
'External power supply READY flag' (Un\G69, b7) turns off and the D/A conversion stops. In this case, the analog output value
is 0 V/0 mA. When the external power supply is turned off and on again, 'External power supply READY flag' (Un\G69, b7)
turns on after 200ms as described above and the D/A conversion is restarted.
Precautions
Use the external power supply that satisfies the specifications defined in the "Power Supply Specifications" section.
Otherwise, 'External power supply READY flag' (Un\G69, b7) does not turn on. For the power supply specifications, refer to
Page 176 Power supply specifications.
Controlled by the analog output module
Controlled by the program
The value other than initialization value
The value other than initialization value
OFF
OFF
ON
ON
ON
D/A conversion is
not performed.
Initialization value
Initialization value
OFF
ON
OFF
D/A conversion is
performed.
Appendix 8 Buffer Memory Areas
A
APPX
297