104S
♦
ProLinx Gateway
IEC-60870-5-104 (104S) Protocol Implementation
(Firmware v3.00 and later)
Protocol Manual
ProSoft Technology, Inc.
Page 51 of 157
January 22, 2010
3.2
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 104S contains an internal database of 4000, 16-bit words. You must associate
the monitor and control points to database addresses in the 104S. To configure the
points for the 104S, follow these steps:
1
Calculate the number of monitor and control points for the application.
2
Calculate the 104S 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 104S database region.
Summary of Contents for ProLinx 104S
Page 4: ......