Mitsumi electronic 55K Operation mode external signal switching function, Operating Condition

STOP

RESET

PARAMETERS

<Function/operation changed by switching on-off the X12 (MRS) signal>

Operating Condition				Operation				Switching
Operation		X12 (MRS)		Mode	Operating Status	Parameter Write		to PU
	Status	Signal						Operation
mode				(Note 4)
								Mode
	During stop	ON →	OFF		During stop	Allowed →	disallowed	Disallowed
		(Note 3)
PU				External	If external operation
	During	ON →	OFF		frequency setting and start	Allowed →
					signal are entered,		disallowed	Disallowed
	operation	(Note 3)
					operation is performed in
					that status.
	During stop	OFF →	ON		During stop	Disallowed →	disallowed	Allowed
		ON →	OFF			Disallowed →	disallowed	Disallowed
External		OFF →	ON	External	During operation →	Disallowed →	disallowed	Disallowed
	During				output stop
	operation	ON →	OFF		Output stop →	Disallowed →	disallowed	Disallowed
					During operation

Note: 1. When the Pr. 79 setting is 7 and the PU operation interlock signal is OFF, network operation such as computer link cannot be used.

2.If the X12 (MRS) signal is on, the operation mode cannot be switched to the PU operation mode when the start signal (STF, STR) is on.

3.The operation mode switches to the external operation mode independently of whether the start signal (STF, STR) is on or off. Therefore, the motor is run in the external operation mode when

the X12 (MRS) signal is switched off with either of STF and STR on.

4. When an alarm occurs, the inverter can be reset by pressing the key of the operation panel.

5.When the MRS signal is used as the PU interlock signal, switching the MRS signal on and rewriting the Pr. 79 value to other than 7 in the PU operation mode causes the MRS signal to provide the ordinary MRS function (output stop). Also, as soon as 7 is set in Pr. 79, the MRS signal acts as a PU interlock signal.

6.When the MRS signal is used as the PU external interlock signal, the signal logic conforms to the Pr. 17 setting. When Pr. 17 = 2, read ON for OFF and OFF for ON in the above explanation.

(3) Operation mode external signal switching function

1) Preparation

Set "8" (switching to other than external operation mode) in Pr. 79. Using any of Pr. 180 to Pr. 186 (input 4 terminal function selection), allocate the terminal used to input the X16 (PU-external operation switching)

signal.

Refer to page 138 for Pr. 180 to Pr. 186 (input terminal function selection).

Note: When terminal assignment is changed using Pr. 180 to Pr. 186, the other functions may be affected. Check the functions of the corresponding terminals before making setting.

2)Function

When the X16 signal is switched on in the PU operation mode, the operation mode is forcibly changed to the external operation mode. When the X16 signal is switched off in the external operation mode, the operation mode is changed to the PU operation mode. When the X16 signal is switched off during network operation such as computer link, the operation mode is changed to the PU operation mode as soon as the switch-over command to the external operation mode is sent from the computer. Note that this switch-over may only be made while the inverter is at a stop and cannot be made during operation.

X16 Signal	Operation Mode
ON	External operation mode (cannot be changed to the PU operation mode)
OFF	PU operation mode (cannot be changed to the external operation mode)

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