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159
Checking Data Link Status
Section 5-4
When 8-bit Format is Specified (i.e., when using a C200HX/HG/HE, CVM1, CV-series, or CQM1H-series
PLC or when using a CS/CJ-series PLC with the data link status storage format specification in the DM
Parameter Area set to 8-bit format)
(See note 1.)
Note
1.
When the default setting is used for the data link status storage destination,
16 words are determined within the status area according to the unit num-
ber setting. When the 8-bit format is specified, therefore, the data that is
reflected will be limited to node addresses 1 to 32.
When data link status is required for node addresses 33 or larger, do not
use the default setting, i.e., specify the first word of the status storage area.
If this is done when an 8-bit format is specified, 31 words will be used as
the status storage area.
2.
Always 1 for the Controller Link Support Board.
3.
Always 0 for the Controller Link Support Board.
4.
Even if an offset error occurs, the data link will operate and the node will
participate in the data links. In the node where the offset error occurred,
however, all receive area words will be cleared to 0.
PLC status (See note 2.)
0: Inactive (user program not running)
1: Active (user program running)
Communications error (data link reception)
0: Normal
1: Error
PLC's CPU Unit error (See note 3.)
0: Normal
1: Error
Data link participation
0: Not in data link or data link inactive
1: In data link
Offset error (See note 4.)
0: Normal
1: Error
Error: Offset exceeds number of
send words.
Insufficient (short) receive
area (See note 5.)
0: Sufficient
1: Insufficient
Insufficient: Receive area is smaller than
send area. Excess data is truncated; other
data is received.
Remaining receive area
(See note 6.)
0: Not remaining
1: Remaining
Remaining: Receive area is larger than
send area. Data is received and remaining
words are cleared.
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
15
Node 1
Node 3
Node 5
Node 7
to
Node 29
Node 31
Node 33
Node 35
to
Node 55
Node 57
Node 59
Node 61
Node 2
Node 4
Node 6
Node 8
to
Node 30
Node 32
Node 34
Node 36
to
Node 56
Node 58
Node 60
Node 62
7
8
0
First status word + 0
First status word + 1
First status word + 2
First status word + 3
First status word + 14
First status word + 15
First status word + 16
First status word + 17
First status word + 27
First status word + 28
First status word + 29
First status word + 30
Summary of Contents for C200HW-CLK21
Page 3: ...iv ...
Page 9: ...x ...
Page 12: ...xiii TABLE OF CONTENTS Index 367 Revision History 373 ...
Page 13: ...xiv ...
Page 19: ...xx ...
Page 57: ...32 Application Precautions Section 1 5 Example CX Programmer Response Timeout Setting ...
Page 69: ...44 Message Service Procedure Section 2 2 ...
Page 111: ...86 Constructing Networks with Repeater Units Section 3 4 ...
Page 154: ...129 Setting Data Links Section 5 2 Device Information Setting Data Link Tables ...
Page 261: ...236 Response Codes Section 6 7 ...
Page 297: ...272 Message Delay Times Section 8 4 ...
Page 353: ...328 Handling Precautions Section 9 6 ...
Page 364: ...339 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 365: ...340 Changing the Data Link Tables with Active Data Links Section 10 2 ...
Page 369: ...344 Standard Models Appendix A ...
Page 391: ...366 Using the Relay Terminal Block Appendix C ...
Page 397: ...372 Index ...
Page 401: ...376 Revision History ...