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Siemens TCP/IP Ethernet Driver Help
1. If tag is to be read in the process of establishing an association, and a device error (such as transport or
protocol) occurred:
l If tag is a block tag, the entire block will be deactivated. All tags within that block will be deactivated.
This is signified by the postfix message "...Block Deactivated."
l If tag is an array tag or string tag, just this tag will be deactivated.
This is signified by the postfix message "...Tag Deactivated."
2. If tag is to be read in the process of establishing an association, and no device errors occurred:
l If tag is a block tag, the entire block will be invalidated. All tags within that block will be invalidated.
l If tag is an array tag or string tag, just this tag will be invalidated.
3. If tag is to be written in the process of connecting:
l Write operation for the given tag will not take place.
Possible Cause:
1. The TPDU response size is incorrect.
2. An unexpected frame was received. The response code may be incorrect.
3. The frame sequence is out of order.
4. The device's CPU work load is too high.
Solution:
1. Cable noise may cause distortion in the frame, resulting in erroneous data. It may also cause dropped
frames. Verify the cabling between the PC and the PLC's device.
2. Reduce network traffic. If this error occurs frequently, increase the Request Timeout and/or Fail After
attempt count.
3. If this error occurs frequently, decrease the tag group scan rate to reduce the work load on the PLC's CPU.
4. Increase the "Scan Cycle Load from Communication" and "Scan Cycle Monitoring Time".
See Also:
Error Codes
Unable to read <block size> bytes starting at address <address> on device
<device name>. Device returned data access error [Code=<code>].
Error Type:
Warning
Result:
1. If device error (such as transport, protocol, or access) occurred:
l If tag is a block tag, the entire block (address -> address + block size) will be deactivated.
All tags within that block will be deactivated. This is signified by the postfix message "...Block
Deactivated."
l If tag is an array tag or string tag, just this tag will be deactivated.
This is signified by the postfix message "...Tag Deactivated."
2. If no device errors occurred:
l If tag is a block tag, the entire block will be invalidated. All tags within that block will be invalidated.
l If tag is an array tag or string tag, just this tag will be invalidated.
Possible Cause:
A data access error occurred. This will occur if, for instance, a requested address is out of range or is being
referenced incorrectly.
Solution:
www. kepware.com
75
- Siemens TCP/IP Ethernet 1
- Driver Help 1
- Table of Contents 2
- Driver Error Messages 3
- Device Status Error Messages 3
- Overview 5
- Device Setup 6
- Communications Parameters 7
- S7 Communications Parameters 7
- Addressing Options 9
- Tag Import 10
- Cable Diagrams 12
- Step 5a: Connection 0 16
- Step 5b: Connection 1 18
- 6. Click Next Connection 19
- Step 5c: Connection 2 20
- Step 5d: Connection 3 22
- Configuring Connections 30
- (TIA) Portal 31
- Data Types Description 38
- Address Descriptions 39
- S7-200 Address Descriptions 39
- S7-300 Address Descriptions 41
- S7-400 Address Descriptions 41
- S7-1200 Address Descriptions 41
- S7-1500 Address Descriptions 42
- Internal Tags 43
- S7 Data Types 44
- String Support 46
- Hex Strings 46
- Array Support 46
- Counters 47
- Examples 47
- Address Syntax 48
- DB Memory Type 48
- Memory Types 48
- Data Type Suffixes 49
- Byte Switching Suffixes 49
- Suffixes 51
- Siemens STEP 7 Item Syntax 54
- Legacy S7-300/400 Item Syntax 58
- Alternates 59
- Data Block Strings 61
- KL vs. KR vs. DBB 62
- Error Descriptions 63
- Error Codes 63
- Error Type: 71
- Possible Cause: 71
- Solution: 71
- [Code=<code>] 72
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