Many students learning about Weintek touch screen communication skills generally know how to communicate with PLCs, such as M area addresses, V area addresses, and Q area addresses, which are quite simple. Especially for DB block addresses like S7-1200, we often don’t know where to start. So how do we associate them? Let’s take a simple approach to achieve this.
Step 1: (Create DB Block and Write Address)
Step 2: (Create Variable Table Address)
Step 3: (Write Forward and Reverse Interlock Program in OB1 Main Program)
Step 4: (Double-click CPU Properties – Protection – Connection Mechanism – Check Allow Communication Access from Partners (PLC, HM, OPC, etc.) using PUT/GET)
Step 5: (Download Program to PLC and Monitor)
1. Weintek Touch Screen Configuration
Step 1: (System Parameter Settings)
Device Type – Siemens S7-1200/S7-1500 (Absolute Addressing) (Ethernet)
Interface Type: Ethernet
IP Address: Enter 1200 PLC IP Address (192.168.0.144)
Step 2: (Click to Get Tag Information – Select All and Click Confirm)
1. Design Weintek Touch Screen Interface
Step 1: (Associate Button DB Addresses)
Forward Start Address S7-1200 PLC: %DB1.DBX0.0 corresponds to Weintek Touch Screen: DB1Bit0 Reverse Start Address S7-1200 PLC: %DB1.DBX0.1 corresponds to Weintek Touch Screen: DB1Bit1
Stop Address S7-1200 PLC: %DB1.DBX0.2 corresponds to Weintek Touch Screen: DB1Bit2
Forward Start Button Parameters are as follows:
Reverse Start Button Parameters are as follows:
Stop Button Parameters are as follows:
Step 2: (Associate Indicator Light Addresses)
Forward Running Indicator Light Parameters are as follows:
Reverse Running Indicator Light Parameters are as follows:
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Design Weintek Interface
1. Operation Demonstration
Step 1: (Forward Start Operation)
Step 2: (Reverse Start Operation)
Step 3: (Stop Operation)
Demonstration and communication successful. At this point, everything has been completed. Some students may encounter problems in the above steps, so I will list common issues for reference:
Common Problems and Solutions:
Problem 1: If the online automatic tag retrieval fails or cannot retrieve, how to solve it?
Answer: You can choose to manually import tags, the method is as follows:
Step 1: (Click the export button in the upper left corner of the variable table to export variables)
Step 2: (Select the location and name for variable export)
Step 3: (Variable export successful)
Step 4: (System Parameter Configuration)
Device Type – Siemens S7-1200/S7-1500 (Absolute Addressing) (Ethernet)
Interface Type: Ethernet
IP Address: Enter 1200 PLC IP Address (192.168.0.246)
Step 5: (Click Import Tags)
Step 6: (Import Tag Selection – Import Files (d;*db) Linear)
Step 7: (PLC Tags – Location of PLC Export Variable Table)
Step 8: (Select All – Click Confirm)
Step 9: (Tag Import Successful)
Problem 2: If there is no address or no DB offset address when creating DB block in PLC, how to solve it?
Answer: Cancel block optimization access and recompile, the method is as follows:
Step 1: (Select DB Data Block – Right-click Properties)
Step 2: (DB Block – Right-click Properties – Cancel Optimized Block Access)
Source: Technical Training Network, Author: Xu Chenshuang, Reproduction without permission is prohibited~
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