Siemens SIMATIC ET 200SP HA Handbuch Ausrüstung - Seite 34

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Displays and interrupts

7.4 Useful information about diagnostics for the change-over contact encoder type

Description

The module generates a diagnostic interrupt for the following events:

• Channel/component temporarily unavailable

• Hardware interrupt lost

• Module is faulty

• Short-circuit

• Wire break

• Supply voltage missing

• Change-over contact error

• Flutter error

• Parameter assignment error

• Retentive memory in carrier module defective

• Retentive memory in the terminal block defective

• Redundancy partner has different hardware/firmware

• IO redundancy warning

• Redundancy parameter assignment inconsistent

Note

A pending "Module is defective" or "Over temperature" diagnostic is not deleted from the module

without a restart.

7.4

Useful information about diagnostics for the change-over contact

encoder type

Diagnostics for the change-over contact encoder type

With the change-over error diagnostics, the switchover between two input channels is checked.

If there is a signal change in a change-over contact channel and there is no signal change at the

other contact change-over channel after the tolerated switchover time, the diagnostics module

returns a change-over error.

The tolerated switchover time between the two channels is set to the fixed value of 300 ms.

Change-over contact encoders always occupy two adjacent channels: The NO channel is set

according to the encoder type on channel 0, 2, 4, 6, 8, 10, 12 or 14, the respective associated

NC channel 1, 3, 5, 7, 9, 11, 13 or 15 must be deactivated.

Equipment Manual, 08/2019, A5E39293880-AD

DI 16xNAMUR HA