Warning Output Function - Mitsubishi Electric MELSEC Q Series User Manual

3 SPECIFICATIONS

3.2.4 Warning output function

CH1 Warning output flag upper limit value
(Buffer memory address 48,b0)
CH1 Warning output flag lower limit value
(Buffer memory address 48,b1)
Warning output signal (XE)
Warning output clear request (YE)
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(1) When the digital value stored in the buffer memory is greater than the warning
output upper limit value or less than the warning output lower limit value, a
warning is informed by Warning output flag (buffer memory address 48: Un\G48),
Warning output signal (XE), and the ALM LED lighting.
The warning is output for the D/A conversion enabled channel only.
(2) At occurrence of the warning, the analog output value is converted from the
digital value at the warning output upper limit value or warning output lower limit
value.
(3) Warning output flag (buffer memory address 48: Un\G48) and Warning output
signal (XE) turn off when Operating condition setting request (Y9) or Warning
output clear request (YE) turns on.
(4) For the warning output function, whether to enable or disable the warning output
can be set for each channel by using Disconnection detection/Warning output
setting (buffer memory address 47: Un\G47).
To enable the warning output, write "0" to the bit position corresponding to the
channel number and turn on and off Operating condition setting request (Y9). For
default, the warning output is disabled for all channels.
(5) Set CH Warning output upper/lower limit value to the buffer memory address
86 to 89: Un\G86 to Un\G89.
Digital input value
16383
Warning output
upper limit value
Warning output
lower limit value
-16384
OFF
OFF
OFF
OFF
POINT
(1) When a warning is output immediately after D/A conversion is enabled,
operate Warning output clear request after writing digital values between the
warning output upper limit value and warning output lower limit value.
(2) During the analog output test, the warning output function is invalid.
ON OFF
ON OFF
ON
MELSEC-Q
Digital input value
Analog output value
ON
ON
OFF
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