Siemens SIMATIC S7-1500 CPU 1511-1 PN

Article number 6ES7511-1AL03-0AB0
–
Number of sessions, max. 32
–
Number of accessible variables, max. 50000
–
Number of registerable nodes, max. 10000
–
Number of subscriptions per session,
max.
50
–
Sampling interval, min. 100ms
–
Publishing interval, min. 200ms
–
Number of server methods, max. 20
–
Number of inputs/outputs per server
method, max.
20
–
Number of monitored items, max. 4000; for 1 s sampling interval and 1 s send
interval
–
Number of server interfaces, max. 10 of each "Server interfaces" / "Companion spe
cification" type and 20 of the type "Reference
namespace"
–
Number of nodes for user-defined serv
er interfaces, max.
15000
•
Alarms and Conditions Yes
–
Number of program alarms 100
–
Number of alarms for system dia
gnostics
50
Further protocols 
•
MODBUS Yes; MODBUS TCP
S7 message functions 
Number of login stations for message func
tions, max.
32
Program alarms Yes
Number of configurable program messages,
max.
5000; Program messages are generated by the
"Program_Alarm" block, ProDiag or GRAPH
Number of loadable program messages in
RUN, max.
2500
Number of simultaneously active program alarms
•
Number of program alarms 600
•
Number of alarms for system diagnostics 100
•
Number of alarms for motion technology
objects
160
Test commissioning functions 
Joint commission (Team Engineering) Yes; Parallel online access possible for up to 5
engineering systems
Status block Yes; Up to 8 simultaneously (in total across all ES
clients)
Single step No
Number of breakpoints 8
Status/control 
46
CPU 1511-1 PN (6ES7511-1AL03-0AB0)
Equipment Manual, 11/2022, A5E40869673-AC
Technical specifications