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2. SPECIFICATIONS
MELSEC-A
2.3.5
Disconnection detection
Disconnection of a P t l
00
or cable is detected.
(1) A64RD3C (3-wire type)
Disconnection at each channel is detected and the disconnection-
detected signal (X1
9
to X1 A) that corresponds to that channel is turned
ON.
However, this only applies to
in channels specified for conversion-
enabled.
Example: When channels 1, 2, and
4
are conversion-enabled:
I
A64RD3C
A64RD3C
Disconnection
7
CH1
CH2
Channel
Conversion-
enabledldisabled
Flag
State
CH1
Enabled
OFF
x 1
c
Enabled
CH4
OFF
x 1
B
Disabled
CH3
ON
X1 A
Enabled
CH2
OFF
x 1 9
Since channel 2 is conversion-enabled, the X1A signal is turned
on if a disconnection is detected.
Since channel 3 is conversion-disabled, the X1B signal remains
ON if no disconnection is detected.
2-
10
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