Brand: SIEMENS
Category: Control Unit
Document Type: Manual
Language: EN
Manual for S7-200
Uploaded: Nov. 21, 2025, 7:03 p.m.
Manual Publish Date: 2008-08-01
The SIMATIC Text Display (TD) devices provide a low-cost human-machine interface (HMI), allowing an operator or user to interact with your application. They allow configuration of hierarchical user menus for structured interaction, and can display alarms or messages enabled by S7-200 CPU bits. These devices can be used to view, monitor, and change process variables. They support features like custom keypads, multiple language sets, and can be configured using STEP 7-Micro/WIN.
Troubleshooting and error codes
| Problem | Possible Cause | Possible Solution |
|---|---|---|
| NO PARAMETER BLOCK | The TD device could not find a parameter block in the programmable logic controller. | Configure a parameter block for the TD device using the Text Display wizard, and download it to the S7-200. |
| The TD device found a parameter block in the programmable logic controller, but it contains errors. | Be sure the parameter block address in the TD device matches the actual address of the parameter block. Be sure all fields are within range. Be sure all addresses are valid for the S7-200 CPU. |
|
| No CPU COMM | Address of the S7-200 CPU is incorrect | Correct the address error |
| S7-200 CPU does not have power | Power up the CPU | |
| Cable problems | Check the cable connections | |
| Wrong baud rate configured | Correct the baud rate | |
| Multiple CPUs at the same address | Remove other CPUs and retry | |
| May need network terminations | Refer to Appendix B | |
| Network too long or too many devices on network | Refer to Appendix B | |
| HARDWARE ERROR | TD device is inoperable | The TD device could be defective Replace with a new TD device. |
| NETWORK ERROR | TD device cannot establish a network connection or enter an existing network | Multiple masters with the same address. Remove other masters and retry |
| Cable problems | Check the cable connections | |
| Multiple CPUs at the same address | Remove the other CPUs and retry | |
| CPU BUSY | Some other master has locked the S7-200 CPU by uploading or downloading a program to that CPU | Wait - The message disappears in a few seconds |
| CPU IN STOP MODE | RUN/STOP switch is in STOP | Put CPU in RUN mode |
| Display backlight is on, but no message is displayed | Program checksum failure | Defective hardware: Replace with a new TD device |
| User cannot access the TD system menus | The custom keypad does not contain the ESC and ENTER buttons | To restore the standard TD keypad: 1. Power down the TD device 2. Press and hold the lower right corner (where ENTER key is located on the standard keypad) 3. Power up the TD device The default keypad is restored until the TD device is power cycled again. |