ProSoft Technology 5205-104S-PDPS - Manual (Page 47)

Protocol Implementation 4205/5205-TS-104S-PDPS ♦ ProLinx Standalone
IEC-60870-5-104 to PDPS Communication Module with Time Stamp
ProSoft Technology, Inc. Page 47 of 128
July 12, 2007
Control Data Transfer
The control communication typically occurs when the client sends a command
request to update the module's command points.
The data types addressing are described in the following table:
Data Type Data Size Addressing Type
C_SC_NA 1 bit Bit
C_DC_NA 2 bits Bit
C_RC_NA 1 byte Byte
C_SE_NA 1 word Word
C_SE_NB 1 word Word
C_SE_NC 2 words Word
Some of the command points may be configured to be selected before executed.
Refer to the following parameter to configure the select/operate timeout period.
After the module receives the SELECT operation it will wait for this period of time
for the EXECUTE operation. If the module does not receive an EXECUTE
operation within this period of time it will require another SELECT operation
before the EXECUTE operation.
Select/Operate Timeout : 20000 #Milliseconds before select
#timeout
Command Points Addressing
As discussed before, the command points must be configured in a database area
that is updated at the module. You must associate each point to a database
address in the 4205/5205-TS-104S-PDPS module. The interpretation of this
parameter depends on the point type configured.
C_SC_NA and C_DC_NA
The single-point command and dual-point command points use one bit with bit-
addressing. For example, if you configure the following points:
# Monitor Monitor Require
# Point # DB Address Point # DB Addr Select
# ------- ---------- ------- ------- -------
START
100 1600 0 0 0
101 1601 0 0 0
102 1602 0 0 0
END
These points would be used as follows:
Inf. Object Address Module Database Address
100 Bit 0 of word 100
101 Bit 1 of word 100
102 Bit 2 of word 100
The protocol specification defines a qualifier value that is set by the master to
determine the duration of the pulse (short, long or persistent).