Disconnection Detection Function - Mitsubishi Electric MELSEC Q Series User Manual

3 SPECIFICATIONS

3.2.6 Disconnection detection function

Output monitor value (mA)
Disconnection detection flag
(buffer memory address 49
: Un\G49)
Disconnection detection
signal (XD)
Disconnection detection
clear request (YD)
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(1) When the Q62DA-FG, whose output range is set to either 4 to 20mA, 4 to 20mA
(Extended mode), or user range setting 1, detects disconnection at output monitor
value of 1mA (with an accuracy of
disconnection with Disconnection detection flag (buffer memory address 49:
Un\G49), Disconnection detection signal (XD), and by flashing of the ALM LED.
Disconnection is detected only on the channel set for D/A conversion enable and
D/A output enable.
(2) Disconnection detection flag (buffer memory address 49: Un\G49) and
Disconnection detection signal (XD) turn off when Operating condition setting
request (Y9) or Disconnection detection clear request (YD) turns on.
(3) For the disconnection detection function, whether to enable or disable the
disconnection detection can be set for each channel by using Disconnection
detection/Warning output setting (buffer memory address 47: Un\G47). To enable
the disconnection detection, write "0" to the bit position corresponding to the
channel number and turn on and off Operating condition setting request (Y9). For
default, the disconnection detection is disabled for all channels.
20
10
1
0
OFF
OFF
OFF
1.0%) or lower, the module notifies the
ON
ON
MELSEC-Q
Disconnection assumed range
OFF
OFF
ON
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