Omron CVM1-CLK21, Руководство по эксплуатации

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Commands and Responses for Controller Link Units Section 6-5
Note 1. The data link status is not refreshed while the data links are inactive.
2. Nodes which are not active in the network or participating in the data links
will generate communications errors.
3. Any node which is not active in the network retains the status that existed
immediately prior to the generation of the communications error.
4. Only the PC operation status and PC 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
7 6 5 4 3 2 1 0
–
7 6 5 4 3 2 1 0
Byte 1
Byte 2
Byte 3
Bit
Byte 32
Node #1
Node #2
Node #3
Node #32
Data link status for each node
PC status
0: Inactive (user program not running)
1: Active (user program running)
Communications error (data link reception)
0: Normal
1: Error
PC's CPU Unit error
0: Normal
1: Error
Data link participation
0: Not in data link or data link inactive
1: In data link
Offset error
0: Normal
1: Error Error: Offset exceeds number of send words.
Insufficient (short) receive area
0: Sufficient
1: Insufficient Insufficient: Receive area is smaller than send area.
Excess data is truncated; other data is received.
Remaining receive area
0: Not remaining
1: Remaining Remaining: Receive area is larger than send area.
Data is received and remaining words are cleared.
Command
code
Test data
1,998 bytes
max.
08 01
Command
code
Test data
1,998 bytes
max.
08 01
Response
code