Technical Data - Siemens SINUMERIK 840Dsl Configuration Manual

Technical data

Technical data
Description
Number of sessions
Number of subscriptions
Maximum samples / second
Min. sampling interval
Sampling intervals
Min. publishing interval
Publishing intervals
Max. number of users
Max. lifetime interval (LifeTime Count)
Session timeout
Max. monitored items queue size (Subscription
Queue size)
1) Session = Connection of a client to a server
2) Subscription = In an existing session a subscription is a functionality for monitoring data items.
Calculating maximum subscription load
The maximum number of monitored items (Page 45) depends on the update time of the
subscriptions. Therefore the max. number of monitored items can be calculated as down below.
The maximum subscription load is calculated from the load imposed to the system by the
sample rate of all monitored items from all subscriptions of all active sessions.
Max number of monitored items = Systemload / Updates per second
Updates per second = 1 / Sampling rate (in seconds)
Systemload SINUMERIK 840D sl = 1000 items/s
Systemload SINUMERIK 828D = 500 items/s
SINUMERIK Integrate for Engineering Access MyMachine / OPC UA
Configuration Manual, 04/2018, 6FC5397-1DP41-0BA0
1)
2)
Value
828D
840 D sl
828D
840D sl
828D
840D sl
100 ms
{100, 250, 500, 1000, 2500, 5000} ms
100 ms
{100, 250, 500, 1000, 2500, 5000} ms
20
3600000 s
60 s
10000
8
5
10
5
10
500 1/s
1000 1/s
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