212
Commands and Responses for Controller Link Units
Section 6-5
4.
Any node which is not active in the network retains the status that existed
immediately prior to the generation of the communications error.
5.
Only the PLC operation status and PLC error status will be refreshed for
nodes that are not participating in a data link that is active in the network.
6-5-8
ECHOBACK TEST
Executes an echoback communications test between specified nodes.
Command Block
Response Block
Parameters
Test data (command, response):
For the command, up to 1,998 bytes of
data can be specified to be sent to a specified node. For the response, the
test data that was sent by the command is returned unchanged.
An error is generated if the data returned by the response is different from the
data that was sent by the command.
6-5-9
BROADCAST TEST RESULTS READ
Reads for each node the results (number of receptions) of a BROADCAST
TEST DATA SEND command that has been sent to all nodes in a specified
network. (For details on the BROADCAST TEST RESULTS SEND command,
refer to
6-5-10 BROADCAST TEST DATA SEND
Command Block
Response Block
Parameters
Number of receptions (response):
The number of times that broadcast test
data has been received at the command destination node from the time that
the last BROADCAST TEST RESULTS READ command was sent until this
one was sent is returned.
An error will be generated if that number of receptions differs from the number
of times that the BROADCAST TEST DATA SEND command was issued dur-
ing that same period.
The
number of receptions
value being retained at the destination node is
cleared when the BROADCAST TEST RESULTS READ command is exe-
cuted.
Command
code
Test data
1,998 bytes
max.
08
01
Command
code
Test data
1,998 bytes
max.
08
01
Response
code
Command
code
02
08
Response
code
Number of
receptions
Command
code
08
02
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 ...