Filter
Top Products
206
Commands and Responses for Controller Link Units Section 6-5
ON, the network participation status of nodes 33 to 62 is returned in the upper
four bits of bytes 17 through to the lower four bits of byte 32. In other models,
the areas corresponding to nodes 33 to 62 are reserved for system use.
Actual communications cycle time (response): The actual communica-
tions cycle time is returned in units of 100
µs in hexadecimal.
Polling node address: The current polling node address is returned in hexa-
decimal.
Data link operation (response): Indicates the status of data link operation in
the network.
Data link type (response): Indicates the data transmission status of the local
node’s data links. It is configured as shown in the following diagram. This
parameter is valid only during data link operation. While data link operation is
inactive, the value from the previous operation is retained.
Data link recurring error status (response): Indicates whether an error con-
tinues to occur at a node when data link data is received. If an error continues
to occur at the same node when the data is received, the bit corresponding to
that node turns to “1” (i.e., turns ON). The configuration is shown in the follow-
ing diagram.
When CS1W-CLK21-V1 and CJ1W-CLK21-V1 Units are used and the Wired
Network 62 Node Enable Bit of the DM Parameter Area software switch is ON,
the continuous data link error status of nodes 33 to 62 is returned in bytes 5
through 8. In other models, bytes 5 through 8 are reserved for system use.
Bit
Data link operational status
0: Inactive
1: Active
7
0
6 5 4 3 2 10
00 0000
Bit
Local node data transmission status
0: Transmission
1: No transmission
7
0
6 5 4 3 2 10
00 0000
Bit
7
7
6 5 4 3 2 10
6543218
15 14 13 12 11 10 916
23 22 21 20 19 18 1724
31 30 29 28 27 26 2532
39 38 37 36 35 34 3340
47 46 45 44 43 42 4148
55 54 53 52 51 50 4956
–626160595857–
The numbers in the boxes indicate the node
addresses. The bit status of a particular
node address shows whether or not there is
a recurring data link error at that node.
0: No recurring error
1: Recurring error
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
Reserved for system use.