Lenze DDS Target 9300 Servo PLC V8.x Instrukcja Użytkownika Pobierz pdf (Strona 111)

9300 Servo PLC

Appendix

3.4 System POUs

3−105

9300 Servo PLC EN 5.1

3.4 System POUs

System POUs are POUs of the "program" type which accept the features of a certain name, i.e. they

are started by an event registered by the PLC.

 The program includes max. 1000 instructions for system POUs.

 Unlike tasks or PLC_PRG, system POUs are not run−time monitored by a "watchdog".

 The special POU names and the corresponding event for starting the POU are listed in the

following table:

POU name Event for starting POU The POU starts if

PLC_TaskOverrun Task overflow

...the task monitoring time is exceeded.

PLC_RealError Floating−point error ...a floating−point error occurs.

PLC_FailTripping TRIP ...a trip is set.

PLC_WarningTripping Warning ...a warning is activated.

PLC_MessageTripping Message ...a message is activated.

PLC_FailQspTripping FAIL−QSP ...a FAIL−QSP is activated.

Note: Only called when pulse inhibit is inactive!

PLC_CANError CAN bus error ...a CAN bus error occurs (e.g. BUS−OFF).

PLC_AIFError AIF bus error ...an AIF bus error occurs.

PLC_Restart Start ...the START command is activated after a STOP.

PLC_ColdStart Cold start ...a RESET, RESET (cold), RESET (original) or a program download has been

activated.

Note: System variables must not be used in PLC_ColdStart. Otherwise, unexpected

controller errors may occur (e.g. motor start).

PLC_Stop PLC stop ...the STOP command is activated.

Note: This POU is not activated through a RESET (cold, original)!

Not available for Drive PLC.

The CAN/AIF bus is ready after this POU has been executed.

Tip!

If you need a system POU for an event−controlled start, simply create a "program" POU and use the

POU name listed in the table for the corresponding event as POU name.

1 2 ... 106 107 108 109 110 111 112 113 114 115 116 ... 168 169

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Lenze DDS Target 9300 Servo PLC V8.x Instrukcja Użytkownika Strona 111