WebRelay Users Manual
method #3 described above. In this case the power button is wired in parallel with the relay.
Common and Normally Open contacts are used. When the device needs to be re-booted, the
relay will be pulsed
on
for T1 (see above) seconds. After the first pulse, the relay will stay
off
for
T2 seconds, and then pulse
on
for T3 seconds. The purpose for the first pulse (T1) is to turn the
device off. Usually this requires holding the power switch for 5-10 seconds. Once the device is
off, there is a delay before turning the device back on. This delay time is specified in parameter
T2. Finally the device is turned on once again by applying a second pulse (T3) to the power
switch. The second pulse usually does not need to be as long as the first. The notation
without
pp
means without power-up pulse. The power-up pulse is explained in the next paragraph.
pulse on T1 secs, off T2 secs, on T3 secs (with pp)
This option is identical to the option
above, but with one exception; it pulses at power-up (
with pp
). If the WebRelay loses power, it
is assumed that the device which the WebRelay controls has also lost power. When the power is
restored, the device will not come back on without some help. When this reboot option is
selected, the WebRelay will automatically power the device on each time power lost and
restored. It does this by waiting T2 seconds after power-up and then pulsing T3 seconds. After
the pulse to turn the device on, the WebRelay will allow the device to boot and begin its normal
ping algorithm.
Failed Pings Before Reboot
The device will be re-booted after this number of consecutive ping failures. This number can be set
between 1 and 255.
Max Reboot Attempts
After the device has been re-booted this number of times without any successful pings, it is assumed
that there are problems with the device and the WebRelay will no longer attempt to reboot the device. At
this point, the WebRelay will leave the device on but will disable the auto reboot feature. The auto reboot
feature will remain disabled until a user enables it through the control page or WebRelay is powered
down and powered up once again. This number can be set between 1 and 255.
3.1.4.3 Standard or Automatic Reboot Mode
The following parameters are available when WebRelay is set to either
Standard
or
Automatic Reboot
relay mode.
Remote Relay Options
The optically-isolated input can be configured to control a WebRelay device at a remote location. The
‘Remote Relay Options’ setting is used to specify if and how the input affects the remote relay. The
options in the drop-down list are described below. Note that in all cases, input changes will only affect
the remote 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 remote relay (unless Keep Alive is set to
Yes (TX State
). In other
words, if the input causes the remote relay to go on, a user may turn the remote relay off from the web
browser, even if the local input is still on.
no remote relay control
-
The input has no effect on the remote relay.
remote command equals input
-
When a voltage is applied to the input, a command is sent to
the remote WebRelay to set the relay state to
on
. When a voltage is removed from the input, a
command is sent to the remote WebRelay to set the relay state to
off
.
remote command opposite of input
-
When a voltage is applied to the input, a command is
sent to the remote WebRelay to set the relay state to
off
. When a voltage is removed from the
input, a command is sent to the remote WebRelay to set the relay state to
on
.
send on command when input on (no off command)
-
When a voltage is applied to the input,
a command is sent to the remote WebRelay to set the relay state to
on
. When a voltage is
removed from the input, no commands are sent to the remote WebRelay.
Xytronix Research & Design, Inc.
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