3.2 Displayed State

The 'State' page is the main page of the IO-FEP which shows the actual state of all inputs and outputs. The page automatically refreshes every second (the refresh interval is configurable at the Setup / General page).

The page shows a 5-column table containing all information about the input / output states, temperature readings and faults. The page is read-only, to change an output or waveguide switch position go to the Settings page.

Output Circuits

The output circuits column shows the current state of all outputs which are configured to work as operator controlled outputs. The outputs 1 to 10 are the photo-MOS output circuits which also may be used as HPA inhibit outputs. The lines 11 to 16 refer to the relay output circuits provided by the IO-FEP. The following applies to all output states:

• The displayed state ON/OFF is the logical state of the output. By default ON stands for a closed contact, however, each individual output may be configured to the invers function at the Setup / Output Circuits page.
• Outputs configured as 'UNUSED' neither show a circuit name nor an ON/OFF state.
• Outputs configured to act as an HPA inhibit circuits are displayed with a dimmed name, without a circuit state.

WG Switches

The second column displays the state of the waveguide switches controlled by the IO-FEP. The standard version provides I/O circuits for 8 switches, the IO-FEP-E for 16 switches.

Each switch may show one of the states 'A', 'B' or 'FLT'. The states are determined from the switches' positition indication circuits, 'FLT' is shown if both circuits have the same state (unknown position). Table row referring to switches configured as 'UNUSED' are left empty

Input Circuits

The table columns 3..5 show the state of the input circuits provided by the IO-FEP. The inputs 33 to 48 shown in the last column are only available with the IO-FEP-E.

• Inputs configured as 'INPUT' show the states ON or OFF.
• Inputs configured as 'ALARM' show the states OK or FLT.
• Rows referring to 'UNUSED' inputs are left empty.
• The displayed state is the logical state of each input. By default ON/FLT stands for a closed contact, however, each individual input may be configured to the invers function at the Setup / Input Circuits page.
• The displayed state also takes into account the delay time configured for each individual input. (This probably will not be visible for short delay times)

Temperature Readings

The IO-FEP displays the internal temperature and the reading of up to four external temperature sensors at the table field below the output circuits. For each sensor the sensor name, the temperature and an OK/FLT state is shown. A temperature value is considered 'OK' if the value is inside the limits configured at the Temperature Sensors page.

Protection Switch State

The IO-FEP up to 8 (the IO-FEP-E up to 16) instances of automatic 1:1 protection / redundancy switching units. Each protection switch controls the waveguide switch with the same number. Up to 5 alarm inputs may be assigned to each side of a protection switch at the Setup / Protection page. Two consecutive protection switches can be coupled to build a 2:1 redundancy circuit.

The following state information is provided for each protection switch unit (unconfigured protection switches are shown as empty fields, DISABLED instances show the text DISABLED ):

• The operation mode 1:1-SW-ONCE/1:1-SW-ALWAYS/2:1-SW-ONCE (see Protection for details)
• The chain A fault state (green for OK, red for FAULT)
• The switch Position A/B
• The chain B fault state (green for OK, red for FAULT)
• The SWITCHED flag. This flag is set once the protection switch has actuated the WG switch due to a fault in the active chain. In 1:1-SW-ONCE mode this prevents the protection switch from further switching.
• 2:1 protection switches show the use of the redundant chain (CHAIN-1, CHAIN-2 or NONE) in place of the switch setting. The fault state of the the redundant chain is shown below this.

Unavailable instances of protection switches are shown shaded with dark background.