ST600s | Digital inputs – What can be connected and how?

The digital inputs of the ST600 frequency inverter enable the inverter to be controlled by means of sensors, switches, a PLC, etc.. Terminals S1 to S4, as well as HDIA and HDIB are used for connection. The HDIA and HDIB input terminals can be used as both digital and high-speed pulse inputs.

Up to 72 different functions can be parameterised for each of these terminals, which are triggered by a control pulse at the input.

The sensor or switch is connected between the respective input terminal and +24V.

The functions are to be parameterised at the following parameters:

Terminal	Parameter	Description
S1	P05.01	Digital input
S2	P05.02	Digital input
S3	P05.03	Digital input
S4	P05.04	Digital input
HDIA	P05.05	P05.00 = x0 – Pulse input P05.00 = x1 – Digital input
HDIB	P05.06	P05.00 = 0x – Pulse input P05.00 = 1x – Digital input

 

In the factory setting, the digital input terminals are logically active when they are connected to +24V. The polarity can be changed at parameter P05.08

P00.01 = 1 for control only via terminals.

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