137
Commands and Responses for Controller Link Units
Section 6-5
Parameters
Beginning node to read (command): With the local node as the starting
point (0), specify the node for beginning reading, with a 1-byte hexadecimal
value (2 digits) counted as 1, 2, etc., in the descending (SL2) direction. Set
the value from 00 to 3E Hex (decimal: 0 to 62).
Number of nodes read (command, response): For the command, specify
the number of node addresses to read. All node addresses are read in order
from the local node in the descending (SL2) direction. In the response, the
number of nodes actually read is returned, in the range of 01 to 3E Hex (deci-
mal: 0 to 62).
With the command, the local node is read first regardless of the “beginning
node to read” parameter setting. The number of other nodes addresses to
read, therefore, is the “number of nodes read” minus 1.
Time connection data created (response): The time that the connection
configuration data was last changed is returned in one byte (2 digits) BCD for
each of the following in order: minute, second, day, hour, year, month. The
data is changed with each communications cycle when in token-ring mode
with a normal ring connection.
The year setting is for the two rightmost digits of the year. The hour setting is
made from 00 to 23.
The time will be returned according to the time data set at the local node.
Node address (response): The node address for each node is returned in
one byte (2 digits) hexadecimal.
With this response, the node address of the local node is returned first,
regardless of the “beginning node to read” parameter setting. Then the rest of
the node addresses are returned in order from the node set in the “beginning
node to read” parameter.
Explanation
When the range specified in the “beginning node to read” and “number of
nodes read” parameters is connected as a ring in relation to the local node,
the node addresses are read until the node which is one node in the ascend-
ing direction from the local node. This will result in a normal completion.
In the following network, for example, the beginning node to read is 25, and
the number of nodes read is 6.
The following node addresses will be returned as the response.
Note
1.
In the event of a disconnection, the last data that was changed and saved
will be returned.
2.
If a node is down even though nothing is disconnected, it will be skipped
over for reading.
Node
25
Beginning node to read
Local node
Node
6
Descending
Ascending
Node
32
Node
31
Node
11
Node
12
Node
15
Node
19
1F
19
Node address 32
20
Node address 31
Node address 25 (beginning node to read)
Summary of Contents for CS1W-CLK12-V1
Page 3: ...iv ...
Page 5: ...vi ...
Page 9: ...x TABLE OF CONTENTS ...
Page 11: ...xii ...
Page 59: ...42 Component Names and Functions Section 3 1 Dimensions Unit mm ...
Page 62: ...45 Component Names and Functions Section 3 1 Dimensions Unit mm ...
Page 91: ...74 CVM1 and CV series Optical Ring Controller Link Units Section 4 2 ...
Page 108: ...91 Setting Data Links Section 5 2 Device Information Setting Data Link Tables ...
Page 125: ...108 Checking Data Link Status Section 5 4 ...
Page 181: ...164 Setting Routing Tables Section 7 4 ...
Page 199: ...182 Memory Areas Related to Duplex Operation Section 8 6 ...
Page 275: ...258 Handling Precautions Section 10 7 ...
Page 298: ...281 CS series Optical Bus Controller Link Units Appendix C Dimensions Unit mm 101 35 130 ...
Page 299: ...282 CS series Optical Bus Controller Link Units Appendix C ...