Signal (Device) Explanation; I/O Signal Connector (Cn24); Alarm Output Connector (Cn25) - Mitsubishi Electric -MR-CV User Manual

5.4

Signal (device) explanation

This section describes the signals (devices) of the converter unit.
For the I/O interfaces (symbols in the column "I/O signal interface type" in the table), refer to the following.
Page 61 Interface

I/O signal connector (CN24)

Signal (device) Symbol
name
Forced stop EM1
Reset RES
Alarm ALM
Digital I/F power DICOM
supply input
Ready RDYA
Operation permission RDYB
Converter reset RSO
Digital I/F power DOCOM
supply output

Alarm output connector (CN25)

Signal (device) Symbol
name
Alarm output A
B
C
Connector Function and application
pin No.
CN24-1 When using EM1, set the rotary switch for converter setting (SW1) of the converter unit
to "4".
When EM1 is turned off, the converter is forcibly stopped, the magnetic contactor is
turned off as the drive unit generates a main circuit off warning, and the status becomes
servo-off.
The forced stop state of the converter will be deactivated if EM1 is turned on while the
converter is in the forced stop state.
CN24-2 Used to deactivate the alarm. Turn off RES after at least 100 ms from when it turns on.
Some alarms cannot be deactivated by RES. Refer to the following for the alarms that
cannot be deactivated.
Page 75 CONVERTER UNIT TROUBLESHOOTING
If RES is turned on in an alarm-free state, the state becomes ready-off. This device is not
for stopping and should not be turned on during operation.
CN24-3 When an alarm occurs, ALM turns off.
CN24-4 Input 24 V DC (24 V DC ± 10 % 500 mA) for I/O interfaces. The power supply capacity
varies depending on the number of I/O interface points to be used.
For sink interfaces, connect the positive terminal of the 24 V DC external power supply.
For source interfaces, connect the negative terminal of the 24 V DC external power
supply.
CN24-5 When the converter unit is ready for operation, RDYA turns on.
This signal has the opposite logic of RDYB. RDYA is off from when the power is turned
on until the unit starts up.
CN24-6 When a converter unit error occurs or when a reset is input, RDYB turns on. This signal
has the opposite logic of RDYA. RDYB is off from when the power is turned on until the
unit starts up.
CN24-7 When RES is input to the converter unit, RSO turns on.
CN24-8 Input 24 V DC (24 V DC ± 10 % 500 mA) for I/O interfaces. The power supply capacity
varies depending on the number of I/O interface points to be used.
For sink interfaces, connect the negative terminal of the 24 V DC external power supply.
For source interfaces, connect the positive terminal of the 24 V DC external power
supply.
Connector Function and application
pin No.
CN25-1 This is a changeover contact output which indicates that the protective functions of the
CN25-2 converter unit have been activated and that the output to the drive unit has stopped.
CN25-3 Error state: Open between B-C (closed between A-C)
Normal state: Closed between B-C (open between A-C)
I/O signal
interface
type
DI
DI
DO

DO
DO
DO

I/O signal
interface
type
DO
5 SIGNALS AND WIRING
5.4 Signal (device) explanation
5
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