Text Display (TD) User Manual
System Manual, 08/2008, A5E00765548-03
163
Troubleshooting
C
C.1 Troubleshooting Guide
Troubleshooting
Refer to Table C-1 for a list of the problems that could occur with the TD device and possible
causes and solutions.
Table C- 1 Error Messages
Problem Possible Cause Possible Solution
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.
Be sure the parameter block address in
the TD device matches the actual
address of the parameter block.
NO PARAMETER BLOCK
The TD device found a parameter block
in the programmable logic controller,
but it contains errors.
Be sure all fields are within range.
Be sure all addresses are valid for the
S7-200 CPU.
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
No CPU COMM
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.
Multiple masters with the same
address.
Remove other masters and retry
Cable problems Check the cable connections
NETWORK ERROR
TD device cannot establish a network
connection or enter an existing network
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
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