Hitachi SJ200 Series manual 163

4–36

Using Intelligent Output Terminals

Output Signal ON/OFF Delay Function

Operations and Monitoring

Intelligent outputs including terminals [11], [12], and the output relay, have configurable signal transition delays. Each output can delay either the OFF-to-ON or ON-to-OFF transitions, or both. Signal transition delays are variable from 0.1 to 100.0 seconds. This feature is useful in applications that must tailor inverter output signals to meet timing requirements of certain external devices.

The timing diagram below shows a sample output signal (top line) and the results of various ON/OFF delay configurations.

•Original signal - This example signal waveform consists of three separate pulses named “A,” “B,” and “C.”

•...with ON delay - Pulse A is delayed by the duration of the ON delay time. Pulses B and C do not appear at the output, because they are shorter than the ON delay.

•...with OFF delay - Pulse A is lengthened by the amount of the OFF delay time. The separation between pulses B and C does not appear at the output, because it is shorter than the OFF delay time.

•...with ON/OFF delays - Pulse A is delayed on both leading and trailing edges by the amounts of the ON and OFF delay times, respectively. Pulses B and C do not appear at the output, because they are shorter than the ON delay time.

			ON		OFF		ON
		delay			delay	delays
Output Signals:
	1			A		B		C		OFF
									delays
original (no delays) 0
...with ON delay	1
	0
...with OFF delay	1
	0
...with ON/OFF delays	1										t
	0

To configure ON and OFF delays, use the following table to set the desired delay times.

Func.	Description		Range	Default
C144	Terminal [11]	ON delay	0.0 to 100.0 sec.	0.0
C145	Terminal [11]	OFF delay	0.0 to 100.0 sec.	0.0
C146	Terminal [12]	ON delay	0.0 to 100.0 sec.	0.0
C147	Terminal [12]	OFF delay	0.0 to 100.0 sec.	0.0
C148	Output relay ON delay		0.0 to 100.0 sec.	0.0
C149	Output relay OFF delay		0.0 to 100.0 sec.	0.0

Use of the ON/OFF signal delay functions are optional. Note that any of the intelligent output assignments in this section can be combined with ON/OFF signal timing delay configurations.