ProSoft Technology PTQ-101M - Manual (Page 131)

Reference PTQ-101M ♦ Quantum Platform
IEC 60870-5-101 Master Communication Module
ProSoft Technology, Inc. Page 131 of 181
May 14, 2008
Normal Data Transfer
Normal data transfer includes the transferring of data received by or to be
transmitted to the master drivers and the status data. These data are transferred
through read (input image) and write (output image) blocks. Refer to Module
Configuration for a description of the data objects used with the blocks and the
ladder logic required. The following topics discuss the structure and function of
each block.
Input Data (3x Register Data)
These blocks of data transfer information from the module to the Quantum
processor. The structure of the input image used to transfer this data is shown in
the following table:
Offset Description Length
0 Sequence Counter 1
1 Block ID 1
2 to 63 Command Response Data 62
64 to n Read Data 0 to 3999
Output Data (4x Register Data)
These blocks of data transfer information from the Quantum processor to the
module. The structure of the output image used to transfer this data is shown in
the following table.
Offset Description Length
0 Sequence Counter 1
1 Block ID 1
2 to 63 Command Data 62
64 to n Write Data 0 to 3999
Command Control Blocks
Block identification codes greater than 9900 are utilized to perform special
functions in the module. Each control block recognized and used by the module
is defined in the following topics.
Command Codes Descriptions
9250 Status Block
9901 User Constructed Command
9902 Command Control Block (Add command to Command List Queue)
9903 Event Messages from Master port
9950 Command List Error data
9970 Set PLC time using module's time
9971 Set module's time using PLC time
9999 Cold Boot Request from PLC (Block contains no data)
Note: The command code in the I/O area is also referred to as the block ID.