Precautions For Mdu With Cc-Link Communication; I/O Signal List (With Cc-Link Communication) - Mitsubishi Electric NF400-SEW Instruction Manual

10.3 Precautions for MDU with CC-Link communication

(1) Note that the special link registers of the master unit (SW0084 to SW0087) will not be set to
MDU.
(2) A power outage will occur in the CC-Link I/F section if the power turns OFF for at least 5 to 10 ms. When the power is restored, the initial data
processing request flag (RX(n+1)8) will be set to
circuit breaker status (RXn0 to RXn7) and the upper/lower limit bits (RXn8 and RXn9) will be retained at their states prior to the power outage, and
the remote registers (RWrn to RWrn+3) will be set to 00H.
(3) Refer to " MDU Breaker Programming Manual

10.4 I/O signal list (with CC-Link communication)

The MDU uses 32 input contacts and 32 output contacts when sending and receiving data with the master unit.
The following table shows I/O signal assignment and signal names.
Device RX indicates an input signal from the MDU to the master unit, while device RY indicates an output signal from the master unit to the MDU.
Signal direction:
MDU → Master unit
Device No.
RXn0
RXn1
RXn2
RXn3
RXn4
RXn5
RXn6
RXn7
RXn8
RXn9
RXnA
RXnB
RXnC
RXnD
RXnE
RXnF
RX(n+1)0 to RX(n+1)7
RX(n+1)8
RX(n+1)9
RX(n+1)A
RX(n+1)B
RX(n+1)C to RX(n+1)F
n: Address assigned by the station number setting
Note 1: If the alarm retention setting is set to
the MDU, even if the cause of the alarm is eliminated.
Note 2: When the error status flag (RX(n+1)A) is
If the error status flag is set to
Note 3: If an unusable device is turned ON/OFF by a sequence program, MDU functionality is not guaranteed.
1 (ON), remote READY (RX(n+1)B) will be set to
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" for details on PLC programs.
Signal name
ON/OFF (AX) status flag
Trip (AL) status flag
Pre-alarm (PAL) status flag
Unusable
Unusable
Unusable
Overload cutoff (LTD) flag
Short cutoff (STD/INST) flag
Lower limit value UNDER
Upper limit value OVER
Unusable
Overcurrent alarm (OVER) status flag
Unusable
Command complete response flag
Unusable
Initial data processing request flag
Unusable
Error status flag
Remote READY
Unusable
self-hold and this is set once to
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1 (ON), the bit (RXn8, RXn9) status does not change.
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" 1 " (ON), we recommend eliminating the cause of the error immediately.
1 (ON), even if a watchdog timer error occurs in the
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0
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Signal direction:
Master unit → MDU
Device No.
RYn0 to RYnE
RYnF
RY(n+1)0 to RY(n+1)7
RY(n+1)8
RY(n+1)9
RY(n+1)A
RY(n+1)B to RY(n+1)F
1 (ON), it will continue to be
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(OFF), the bits that indicate the alarm and
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Signal name
Unusable
Command execution request flag
Unusable
Initial data processing complete flag
Unusable
Error reset status flag
Unusable
1 (ON) until the alarm is reset on
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