Limiter

The limiter makes it possible to limit the electrical output value to protect the connected signal sink.

Parameter:

Index	Designation
80nD:1C	Limiter Low Value
80nD:1D	Limiter High Value

Result:

A setpoint higher/lower than the limit values leads

to increase +1 of the corresponding counter Index 90n0:06 "Limiter Low Counter" or Index 90n0:07 "Limiter High Counter" (stored secured against power failure)
to display Error + Overrange/Underrange in the PDO "AO Status and Error-LED"
to a limitation of the electrical output in the amount of the set amplitude

By default, the limiter is set to the maximum limits of the technical AEW and therefore has no effect.

The counter is reset

by the command x402n to index FB00:01 (channel1: n=0, channel 2: n=1, ...), the success is displayed with "255" in index FB00:03 Response.
or by the command x4001 "Reset all AO counters"
or by changing the interface

Limiter 1: — CoE Index FB00, DEV Command

During command execution, "Status" 255 "busy" is displayed in index FB00:02, "0" means "successfully completed".

The firmware responds to an unknown command with

Limiter 2: — General parameter incompatibility reason, 0x06040043

The limiter limits can be password protected, see section "Password protection for user data".

Example: Sawtooth 1..7 V is output and then a "Limiter High Value" of 5 V is set:

The overrange is counted accordingly below:

Note:

CAUTION

Consider additional protective functions!

The limiter function protects the connected load from unintentionally high or low outputs, for example due to programming errors. However, it is possible that malfunctions may occur.

Depending on the expected level of damage, additional protective functions should therefore be provided. The function must not be used for functional safety purposes!