Hitachi SJ2002 Series, Instruction Manual

Page: 180 / 306

Using Intelligent Output Terminals
Oper
ations
and Monitor
ing
4–38
Output Signal ON/OFF Delay Function
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.
To configure ON and OFF delays, use the following table to set the desired delay times.
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.
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
original (no delays)
1
0
t
1
0
1
0
...with ON delay
1
0
Output Signals:
...with OFF delay
...with ON/OFF delays
A B C
ON
delay
OFF
delay
ON
delays
OFF
delays