Hitachi SJ700-2 instruction manual Output signal delay/hold function, Input terminal response time

Related code

b098: Thermistor for thermal protection control

b099: Thermal protection level setting

C085: Thermistor input tuning

Related code

C160 to C167: Response time of intelligent input terminals 1 to 8

C168: FW terminal response time

Chapter 4 Explanation of Functions

4.2.78 Output signal delay/hold function

The output signal delay/hold function allows you to set on-delay and off-delay times for each output terminal.

Since every output signal is turned on or off immediately when the relevant condition is satisfied, signal chattering may occur if signal outputs conflict with each other. Use this function to avoid such a problem by holding or delaying specific signal outputs. To use this function, set on-delay and off-delay times for individual output terminals (a total of six terminals, such as intelligent output terminals [11] to [15] and the alarm relay terminal).

Output terminal	On-delay time	Off-delay time
11	C130	C131
12	C132	C133
13	C134	C135
14	C136	C137
15	C138	C139
RY(AL*)	C140	C141

Related code

C130: Output 11 on-delay time

C131: Output 11 off-delay time

C132: Output 12 on-delay time

C133: Output 12 off-delay time

C134: Output 13 on-delay time

C135: Output 13 off-delay time

C136: Output 14 on-delay time

C137: Output 14 off-delay time

C138: Output 15 on-delay time

C139: Output 15 off-delay time

C140: Output RY on-delay time

C141: Output RY off-delay time

Item	Function code	Range of data	Description
Output on	C130/C132/C134/	0.0 to 100.0 (s)	Setting of on
	C136/C138/C140
Output off	C131/C133/C135/	0.0 to 100.0 (s)	Setting of off
	C137/C139/C141

4.2.79 Input terminal response time

- The input terminal response time function allows you to specify a sampling time for each of intelligent input terminals 1 to 8 and the FW terminal. You can use this function effectively to remove noise (e.g., chattering).

-If chattering hinders constant input from an input terminal, increase the response time setting for the input terminal. Note that an increase in response time deteriorates the response. The response time can be set in a range of about 2 to 400 ms (corresponding to settings of 0 to 200).

Item	Function code	Range of data	Description
Response time of intelligent	C160-C167	0. to 200.	Variable in step of 1
input terminals 1 to 8
FW terminal response time	C168

4.2.80 External thermistor function (TH)

The external thermistor function allows you to connect an external thermistor installed in external equipment (e.g., motor) to the inverter,

and use the thermistor for the thermal protection of the external equipment. Connect the external thermistor to control circuit terminals TH and CM1.

Make the functional settings according to the thermistor specifications as described below.

When using this function, the wiring distance between the inverter and motor must be 20 m or less. Since the thermistor current is weak, isolate the thermistor wiring to the inverter from other wirings appropriately to prevent the thermistor signal from being affected by the noise caused by other signal currents, including the motor current.

Item	Function code	Range of data	Description
		00	Disabling the external thermistor (TH) function
Thermistor for thermal	b098	01	Enabling the TH function (resistor element with
			a positive temperature coefficient [PTC])
protection control
		02	Enabling the TH function (resistor element with
			a negative temperature coefficient [NTC])
Thermal protection level			Setting of the thermal resistance level
	b099	0 to 9999. (Ω)	(according to the thermistor specifications) at
setting
			which to trigger tripping
Thermistor input tuning	C085	0.0 to 1000.	Setting for gain adjustment

Note: Specifying "01" for the thermistor for thermal protection control (b098) without an external thermistor connected makes the inverter trip.

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