WebControl
TM
PLC User Guide Version 3.02.17f
Copyright(c) 2008,-2013 CAI Networks, Inc. 16
value. Another way to set their value is to use /api/seturom.cgi call. Please refer to
the FAQ section for that method.
For 1-wire devices on a complex bus configuration, its timing is critical. Time Data
Sample Offset (TDSO) field is for user making his own timing adjustment based on
his setup. Default TDSO is 15uS. For shorter bus, it can be reduced to 14uS or
lower. For longer bus, 16uS or longer may be desirable. 1-wire signals are travelled
in CAT5 cable at speed about 20Meter/uS. However, we recommend to add filter
resistor to reduce bounced signals from stub wire and far end of the bus, instead of
change the timing.
When Web polling enabled, WebControl
TM
PLC building active Java code will
constantly update the browser display for temperature, humidity, and I/O status.
Please note with such a update, it may take significant amount bandwidth from your
network, as well as WebControl’s processor power.
3.7 Reset Setup
If the configuration was totally mess up, user can reset the board to factory default
configuration by shorting the RESET jumper while powering up the WebControl
TM
.
Please note reset will wipe out the entire configuration, including the PLC program.
Please make sure backup your PLC program before reset. After reset, the login ID
and password will be restored to “
admin/password
”. Default IP address is
192.168.1.15 with DHCP disabled.
