Support

Getting help with S7 Explorer

Frequently Asked Questions

I can't connect to my Siemens PLC.

Confirm the PLC IP is reachable (ping 192.168.1.1) and that port 102 (ISO-on-TCP) is open. For S7-1200 and S7-1500 the default routing is rack 0, slot 1. Ensure your Mac and the PLC are on the same subnet. If the connect button still fails, check PUT/GET is enabled on the PLC (see below).

What rack and slot should I use?

S7-1200 and S7-1500: rack 0, slot 1. S7-300/400: the rack/slot of the CPU (commonly rack 0, slot 2). The slot points at the CPU, not the power supply. Wrong rack/slot is the #1 cause of connection success-but-no-data.

How do I read a data block (DB)?

Connect to the PLC, then open the data-block browser. Select the DB number and offset. Ensure the block is not protected/obfuscated in TIA Portal and that PUT/GET communication is permitted in the PLC's protection settings. Without PUT/GET, reads return an access error.

PUT/GET is disabled — how do I enable it?

In TIA Portal: PLC Properties → Protection & Security → Permitted access with PUT/GET communication from remote partner. Download the changed project to the PLC. Older firmware may also require enabling "Permit access with PUT/GET" in the CPU communication load.

My license key doesn't work.

Enter the full key including dashes (format: VOLTRUS-S7-XXXX-XXXX-XXXX). An internet connection is required during first activation so the app can validate the key once. After activation, the app works offline. If it still fails, contact support below.

I bought from the Mac App Store. Do I need a license key?

No. The Mac App Store version is automatically licensed through your Apple ID. No license key needed. The paywall only appears in the direct-download (DMG) version.

I bought via Polar.sh but want to switch to the Mac App Store.

Purchases through Polar.sh and the Mac App Store are separate. We cannot transfer purchases between platforms. Both versions are identical in features.

The app crashes or freezes.

Make sure you're running macOS 13 (Ventura) or later. If the app freezes during a read/write, try disconnecting and reconnecting. If the issue persists, contact support with your macOS version, the app version, PLC model/firmware, and what you were doing when it happened.

Contact Support

Email

For bug reports, feature requests, license issues, or general questions.

support@voltrus.id

Please include:

  • S7 Explorer version (find in app → Info)
  • macOS version
  • Mac model (Intel or Apple Silicon)
  • PLC model and firmware (e.g. S7-1214C DC/DC/DC, FW 4.5)
  • Steps to reproduce the issue

Response Time

We aim to respond within 24 hours on business days. Complex issues may take longer. License-related questions are typically answered within a few hours.

Refund Policy

Mac App Store purchases: Refunds are handled by Apple through your App Store account settings.

Polar.sh purchases: Contact us at the email above within 30 days of purchase for a full refund. No questions asked.