System States

Off

The TeSys island is not energized.

Pre-operational

The TeSys island enters the pre-operational state during the boot process.

• The fieldbus and service ports on the bus coupler begin to activate.

• The avatars selected for the island are not yet activated.

• All starters, SILSafety Integrity Level according to standard IEC 61508.* starters, and I/O modules are de-energized, defined as follows:

  • Starters and SIL starters are in the open state

  • Outputs from the I/O modules are off (set to zero)

Operational

Once the TeSys island has finished booting, it enters the operational state if the following conditions exist:

• No events are detected.

• The project file on the micro SD card loads successfully to the bus coupler.

• The hardware passes consistency checks.

• All settings in the .PSX project file are applied.

Test mode

You can enter test mode from the pre-operational and operational states.

Test mode gives you direct control of the power modules and the digital I/O module outputs, using the digital tools. These tools include SoMove™ software, running the TeSys™ island DTM, and the Operation and Maintenance Tool (OMT). During Test mode, the only avatar activated is the System avatar. Once you enter Test mode, you must manually exit Test mode to return the TeSys island to the operational state.

Minor Event

Minor events on the system include the following:

• No module in the island

• Too many physical modules detected in the island

• A mismatch between the installed modules and the modules defined in the context file

• A voltage fluctuation in the island’s control power supply

When the TeSys island encounters a minor event, the fieldbus and service ports remain activated. The only avatar activated is the System avatar. All starters, SIL starters, and I/O modules are de-energized, defined as follows:

• Starters and SIL starters are in the open state

• Outputs from the I/O modules are off (set to zero)

Fallback Mode

When TeSys island in degraded mode, avatars with local control are driven by local inputs. All other modules in the avatars enter Fallback Mode configured. Following are the options available for configuration of Fallback Mode for each avatar:

• Off

• On

• Hold

When TeSys island is in degraded mode and if Fallback Mode is configured as Off for the avatar then:

• Avatars with Starters or SIL starters place all outputs in the open state

• Power interface with I/O avatar digital outputs are set to Off

• Digital I/O avatar outputs are set to Off

• Analog I/O avatar output is set to default value

• If there is no I/O assignment to the digital output port, the digital output on avatars with digital I/O modules and starters, safe starters, or PIM modules will be set to Off

• If there is no I/O assignment to the analogue output port, the analogue output of avatars with analogue I/O modules and starters, safe starters, or PIM modules will be set to default value

• The output of an analogue or digital I/O module will not enter a Fallback Mode, if there is any I/O assignment to that output. The output will respect the I/O assignment condition

When TeSys island is in degraded mode and if Fallback Mode is configured as On for the avatar then:

• Avatars with Starters or SIL starters place all outputs in the close state

• Power interface with I/O avatar digital outputs are set to On

• Digital I/O avatar outputs are set to On

• Analog I/O avatar output will retains the last known value

• If there is no I/O assignment to the digital output port, the digital output on avatars with digital I/O modules and starters, safe starters, or PIM modules will be set to On

• If there is no I/O assignment to the analogue output port, the analogue output of avatars with analogue I/O modules and starters, safe starters, or PIM modules will retain the last known value

• The output of an analogue or digital I/O module will not enter a Fallback Mode, if there is any I/O assignment to that output. The output will respect the I/O assignment condition

When TeSys island is in degraded mode and if Fallback Mode is configured as Hold for the avatar then:

• Avatars with Starters or SIL starters retain the value of their last command

• Power interface with I/O avatar digital outputs are retained to their last known command

• Digital I/O avatar outputs are are retained to their last known command

• Analog I/O avatar output will set to retains the last known value

• If there is no I/O assignment to the digital output port, the digital output on avatars with digital I/O modules and starters, safe starters, or PIM modules will retained to their last known command

• If there is no I/O assignment to the analogue output port, the analogue output of avatars with analogue I/O modules and starters, safe starters, or PIM modules will retain the last known value

• The output of an analogue or digital I/O module will not enter a Fallback Mode, if there is any I/O assignment to that output. The output will respect the I/O assignment condition

Major Event

When the TeSys island encounters a major event, the fieldbus and service ports are not activated. No avatars are activated, including the System avatar. All power modules and I/O modules are in the Off state. A cycle of the control power is required to exit a major event state.