Modbus TCP
200Nr of IEDs
Limited mostly by maximum response time15Nr of IEDs / line
DNP serial
200Nr of IEDs
Limited mostly by maximum response time15Nr of IEDs / line
DNP LAN
If I/O count is small, number of IEDs can be
bigger
200Nr of IEDs
15Nr of IEDs / line
Table 7.2: Impact on process communication
CommentsImpact on pro-
cess communica-
tion
Function
Always included- 0%Local process database
- 2%Mirroring
- 2%Hot Stand-by redundancy
- 25% when total data update rate to all NCCs
is 50% from the process data update rate
- 25% - 0%Gateway / NCC connections
- 24% when Process display with 1 050 meas-
urement objects in Workplace
- 24% - 1%Process display Workplace
- 18% when Process display with 1 050 switch-
ing device objects in Workplace
- 4% when Process display with 150 measure-
ment objects in Workplace
- 2% when Process display with 150 switching
device objects in Workplace
Per Workplace with Trends with 10 curves on
30 seconds interval logging
- 1%Trends Workplace with data
logging
Per Workplace with Measurement Reports with
15 min report
- 1%Reports Workpace with data
logging
Total of 900 objects data logged by Measure-
ment Reports
The following list shows some examples when IEDs are connected to SYS 600C with
the following Gateway or NCC connections and with Local process database:
• NCC connection with one DNP LAN communication including 84 IEDs resulting
in 1 000 process updates per second sent to one NCC
*)
• NCC connection with two DNP LAN communications including 67 IEDs resulting
in 1 600 process updates per second sent to two NCCs
*)
• NCC connection with one IEC 104 LAN communication including 158 IEDs
resulting in 1 900 process updates per second sent to one NCC
40
1MRS757729
MicroSCADA Pro
SYS 600C 2.93
Product Guide
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