WebRelay Users Manual
device. The WebRelay expects a response after each ping. If a preset number of ping requests
fail, it is assumed that the device is not functioning properly. The WebRelay will attempt to
restore the device to normal operation by rebooting the device. In
Automatic Reboot
mode,
users also have the ability to manually reboot the device from a remote location over the
network.
When the WebRelay is set to
Automatic Reboot
mode, at power-up it will automatically turn the
device on. This is so that users will not need to manually turn the device on after the power fails.
Also note that from the control page, users can temporarily disable the automatic reboot function
but it will automatically be re-enabled if the WebRelay loses and regains power.
Finally, note that the optically-isolated input cannot be used to control the local relay in this
mode. In this mode the status of the input may be displayed on the control page or the input may
be used to control a WebRelay at a remote location but local relay control is disabled.
3.1.4.1 Standard Relay Mode
The following parameters are available when WebRelay is set to
Standard
relay mode.
Pulse Duration
When the WebRelay receives a command (from over the network or through an input change) to
pulse
the relay, this is the time in seconds that the relay will pulse
on
. This time can be set from 0.1 seconds to
86,400 seconds (1 day). Each time the WebRelay
receives a pulse command, the relay will be turned
on
(if not
on
already) and the pulse timer will be reset.
If the WebRelay receives a pulse command and a second pulse command is received before the pulse
timer has expired, the relay will remain on and the pulse timer will be reset so the duration of the pulse
will be extended.
If pulse commands are issued continuously so that the pulse timer is not allowed to expire, the relay will
remain on until after the last pulse command was sent (to be precise, the relay will go off at the time of
the last command plus the Pulse Duration time). The pulse command can be canceled before the pulse
duration time has expired by issuing any other command. The factory default setting for this is 1.5
seconds.
Relay Options
The optically-isolated input can be configured to control the relay. The
Relay Options
setting is used to
specify if and how the input affects the local relay. The options in the drop down list are described below.
Note that in all cases, input changes will only affect the relay at the time the input is changed. Once the
change has taken place the state of the input has no effect on the state of the relay. In other words, if the
input causes the relay to go on, a user may turn the relay off from the web browser, even if the input is
still on.
no local relay control
- The input has no effect on the local relay.
set relay equal input
-
When a voltage is applied to the input, the relay goes
on
. When a
voltage is removed from the input, the relay goes
off
.
set relay equal input (init at powerup)
-
When a voltage is applied to the input, the relay goes
on
. When a voltage is removed from the input, the relay goes
off
. In addition, the relay will
automatically be set to match the state of the input when the WebRelay is powered on.
set relay opposite of input
- When a voltage is applied to the input, the relay goes
off
. When a
voltage is removed from the input, the relay goes
on
.
set relay opposite of input (init at powerup)
-
When a voltage is applied to the input, the relay
goes
off
. When a voltage is removed from the input, the relay goes
on
. In addition, the relay will
automatically be set to the opposite of the state of the input when the WebRelay
is powered on.
Xytronix Research & Design, Inc.
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