Siemens Simatic S7-1500 Manuel - Page 19

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4.1.4

Explanation of the parameters of the Counting mode

Missing supply voltage L+

Enabling of the diagnostics, with missing or too little supply voltage L+.

Wire break

Enabling diagnostics if the line to the encoder is interrupted.

Input delay

This parameter can be used to suppress signal disruptions. Changes to the signal are only

detected if they are constantly pending longer than the set input delay time.

Hardware interrupt

Specifies whether or not a hardware interrupt is generated by the event "Comparison event

occurred for DQ" (rising edge at STS_DQ).

Set output DQ

With this parameter, you specify the behavior of the STS_DQ bit in the feedback interface.

You can assign this bit in the user program, for example, with a hardware output, see

Address space Counting mode (Page 26).

Behavior

Between a

comparison value and the high count-

ing limit

Between a

comparison value and the low counting

limit

Edge selection

With this parameter you specify which edge is used to count.

You can select the following options:

● On rising edge

● On falling edge

● On rising and falling edge

High counting limit

With this parameter you limit the counting range. You can enter a value up to 4294967295

DI 32x24VDC HF digital input module (6ES7521-1BL00-0AB0)

Manual, 09/2016, A5E03485935-AF

- 1).

Meaning

STS_DQ bit is set if the following condition is met:

Comparison value < = counted value < = high counting limit

STS_DQ bit is set if the following condition is met:

Low counting limit < = counted value < = comparison value

Parameters/address space

4.1 Parameter