Analog programming - speed control with potentiometer

[Pejo]

Hi, I'm working on some project for college and i'm stuck on analog programming. Project is next: over the panel with push-buttons and a potentiometer, to a s7-300 PLC, then to the frequency converter abb acs880 which is connected to the asynchronous motor. I know how to wire everything exepct maybe potentiometer. I will show you some pictures if someone want to help me. First, this is analog input AI8x12Bit (6ES7 331-7KF01-0AB0) I address (288...303) and analog output AO4x12Bit (6ES7 332-5HD01-0AB0) O address (304...311). I used scale and unscale blocks for analog programming and i always got sf lamp. Sry on my bad english. 

[Jenda29]

1) You will look to diagnostic buffer for cause or causes of SF and send us more info from diagnostic buffer

2) I´m not sure but 24V in your connection diagram isn´t good, I must set which value you want read - voltage or current and which value. Here is more variants and more connections

Edited May 17, 2016 by Jenda29

[MicroMan]

Hi,

See the FAQ bellow:

How do you connect a potentiometer to the analog module 6ES7 331-1KF0.-0AB0?

In general the SIMATIC S7-300 S7-300 Module data is a good point to start.

[Pejo]

On 17.05.2016. at 6:55 AM, Jenda29 said:

) You will look to diagnostic buffer for cause or causes of SF and send us more info from diagnostic buffer

2) I´m not sure but 24V in your connection diagram isn´t good, I must set which value you want read - voltage or current and which value. Here is more variants and more connections

This is saying:

[Pejo]

Btw when i use simulator everything works :O

[Bryll]

The CPU is missing FC105, download it and the CPU should startup.

The simulator is working since FC105 is in your off-line project.