| Usually if there is a communication
problem, no data will be displayed on the screen on startup or
after changing pages until the timeout period has elapsed. In this
case the data is being displayed (all zeros) instantly without a
timeout, this would indicate that the Client is not requesting any
data from the IOServer. This can be caused by having the port name
of the IODevice set to "MEMORY" or blank. Some people may assume
that the port name is not important if the node is not an IOServer,
however if it is blank it will assume MEMORY PLC and all requests
for data will go to RAM on the local machine rather than over the
network to the IOServer. This problem has been seen when connecting
a Windows Client to a Citect for DOS Scanner (old DOS IOServer, no
longer available) however it is possible to get this problem with a
Windows to Windows configuration. Make sure the port is not
blank. |
