ProSoft Technology PTQ-104C - Manual (Page 111)

49TPTQ-104C ♦ 48TQuantum Platform Reference
47TIEC 60870-5-104 Client
12TUser Manual
9.2.2 Monitor Direction and Control Direction: Point Definition
The protocol specification defines two directions of data: monitor direction and
control direction.
Monitor Direction: The direction of transmission from a server to a Client
Control Direction: The direction of transmission from a Client to a server
The points that are typically transferred from a server to a Client are also known
as Monitor Points (or Monitor Information Objects). The points that are typically
transferred from a Client to a server are also known as Control Points (or
Command Information Objects).
The PTQ-104C contains an internal database of 4000 16-bit words. The monitor
and control points must be associated to the database addresses in the PTQ-
104C. To configure the points for the PTQ-104C, follow these steps:
1 Calculate the number of monitor and control points for the application.
2 Calculate the PTQ-104C database regions that are required for the
application, based on the number of monitor and control points. Define two
separate regions. Remember that each data type stores a different quantity of
data (for example, M_SP_NA uses one bit, M_ST_NA uses one byte, and so
on).
3 Configure each point within its PTQ-104C database region.
ProSoft Technology, Inc. Page 111 of 136
March 4, 2013