Mitsubishi Electric MELDAS C6 Interface Manual page 98

B con-
Signal name
tact
—
ALARM 1
[Function]
This signal informs that system error occured in the controller.
[Operation]
If "watch dog error", "memory parity check error", etc. occurs on the controller side, the signal turns
ON.
The system error can be reset by turning OFF.
(Note 1) Alarm 1 (AL1) may not be detected as signal.
(Note 2) For details of system alarms, refer to the relevant Instruction Manual.
B con-
Signal name
tact
—
ALARM 2 (SERVO ALARM)
[Function]
This signal informs that the controller is in servo alarm condition. If servo alarm occurs, "servo
ready complete output" signal (SA) turns OFF.
[Operation]
The signal turns ON when:
(1) Servo alarm occurs. Servo alarms include the following:
• Servo failure 1 (no signal, overcurrent, overvoltage, etc.)
• Servo failure 2 (motor overheat, excessive error, amplifier external emergency stop, etc.)
• Initial parameter error (parameter transferred to amplifier when the power is turned ON is
illegal)
• Amplifier not mounted (cable is not connected between controller and servo controller).
• Parameter error (a parameter that will disrupt movement of the control axis was found).
Alarm can be reset by turning OFF the power, or using controller reset, or by setting parameter
again, etc., depending on type of alarm. For details of alarm resetting, and servo alarm, refer to the
relevant Instruction Manual.
6. EXPLANATION OF INTERFACE SIGNALS
6.1 PLC Input Signals (Bit Type: X***)
Signal
abbreviation
AL1
Signal
abbreviation
AL2
6-1-9
1st system 2nd system
X430 —
1st system 2nd system
X431 —
3rd system
—
3rd system
—