Pub. 42004-550A
Elemec3 Console Manual—Version 3.0 Page 93 of 114
P:\Standard IOMs - Current Release\42004 Instr. Manuals\42004-550A.docx
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I/O States
SP2/SVS/HUBCOM stations maintain I/O parameters in RAM while energized. These parameters are
variables containing information regarding the current state of the station. These logical states are used to
control the function of the five LEDs (SP2 stations only) and the RTU output.
Table 4. SP2 Input/Output States
Description & Valid Values
A page is being received on any page line.
A page is being received on page line n, where n:=1–8.
A page is being transmitted on any of the configured page lines.
A page is being transmitted on the selected page line where n:=A–E.
The station is receiving audio on one or more party lines.
The station is receiving audio on partly line n, where n:=1–5.
No fault conditions are detected.
Any fault condition is detected.
The network interface physical link is up.
The network interface physical link is down.
RTU input one is in the active state.
RTU input one is in the idle state.
An open circuit fault is detected on RTU input one.
A short circuit fault is detected on RTU input one.
An earth ground fault is detected on RTU input one.
A short circuit line fault is detected on RTU input one.
RTU input two is in the active state.
RTU input two is in the idle state.
An open circuit fault is detected on RTU input two.
A short circuit fault is detected on RTU input two.
The desktop subset’s input one is active.
The desktop subset’s input one is inactive.
The desktop subset’s input two is active.
The desktop subset’s input two is inactive.