905U-G Wireless Gateway
User Manual
Page 151
©September 2004
Appendix 1 Status Registers
I/O Status Registers 5000 - 9499
Bit
Information
Meaning
15
Communications
failure
For inputs, this bit is set (“on”) if no message has been received from
the remote address within the timeout period configured for this input.
The bit is reset ("off") when a message is received.
For outputs, this bit is set (“on”) if transmission to the remote was
unsuccessful after five attempts. The bit is reset ("off") when a
message is transmitted successfully. This bit may also be set if the
Disable Output Transmissions on Comms Fail option is selected - see
the Radio Comms Failure section.
14
Start-up status
For inputs, this bit remains set ("on") following start-up until a
message has been received for this input to give an initial input value.
For outputs, this bit remains set ("on") following start-up until the
905C sends the first radio message for this output to the remote
address.
13
Input / Output
status
This bit is set ("on") if this I/O point has been configured as an input.
12
Active status
This bit is set ("on") if the register has been configured as an I/O point.
11-10
Timer Units
This field determines whether the timer counts down every 10 seconds,
every minute, or every hour.
Timer Units Timer timebase
00 Every 10 seconds
01 Every minute
10 Every Hour
11 Every Hour
9 - 0
Timer
For inputs, the timer value is set to the configured comms fail time for
the input whenever a message has been received for this input. The
timer value will decrease until another message is received. When the
timer value reaches zero, the comms fail status is set. If the configured
comms fail time is zero, then the comms fail status for this input is
never set.
For outputs, the timer value is set to the configured update time for the
output whenever a message is transmitted by the 905C to the remote
address. The timer value decreases. When the timer value reaches
zero, another update message is transmitted to the remote address. If
the configured update time is zero, no update messages are transmitted
for this output.
